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Donaldson Run Bridge, Spanning Donaldson Run, Arlington, Arlington County, VA

Donaldson Run Bridge, Spanning Donaldson Run, Arlington, Arlington Cou...

Significance: Built as part of a project to extend the GWMP closer to the proposed terminus at Great Falls, Virginia. Survey number: HAER VA-77 Building/structure dates: 1957-1959 Initial Construction

Siyeh Creek Culvert, Spanning Siyeh Creek at Going-to-the-Sun Road, West Glacier, Flathead County, MT

Siyeh Creek Culvert, Spanning Siyeh Creek at Going-to-the-Sun Road, We...

Significance: The Siyeh Creek Culvert is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is signif... more

Haystack Creek Culvert, Spanning North gulch of Haystack Creek at Going-to-the-Sun Road, West Glacier, Flathead County, MT

Haystack Creek Culvert, Spanning North gulch of Haystack Creek at Goin...

Significance: The Haystack Creek Culvert is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is sig... more

Glebe Road Bridge, Spanning Glebe Road, Arlington, Arlington County, VA

Glebe Road Bridge, Spanning Glebe Road, Arlington, Arlington County, V...

Significance: Built as part of a project to extend the GWMP closer to a proposed terminus at Great Falls, Virginia. Survey number: HAER VA-75 Building/structure dates: 1957-1959 Initial Construction Building... more

Gulf Branch Bridge, Spanning Gulf Branch, Arlington, Arlington County, VA

Gulf Branch Bridge, Spanning Gulf Branch, Arlington, Arlington County,...

Significance: Built as part of a project to extend the GWMP closer to a proposed terminus at Great Falls, Virginia. Survey number: HAER VA-76 Building/structure dates: 1957-1959 Initial Construction

Sieur de Monts Spring Bridge, Spanning Park Loop Road at Route 3 near Sieur de Monts Spring, Bar Harbor, Hancock County, ME

Sieur de Monts Spring Bridge, Spanning Park Loop Road at Route 3 near ...

Significance: The Sieur de Monts Spring Bridge provided a separated grade crossing between the Bar Harbor-Seal Harbor highway and the Park Loop Road. Boggy soil conditions at the site forced the contractor to ... more

Sprague Creek Culvert, Spanning Sprague Creek at Going-to-the-Sun Road, West Glacier, Flathead County, MT

Sprague Creek Culvert, Spanning Sprague Creek at Going-to-the-Sun Road...

Significance: The Sprague Creek Culvert is one of approximately seventeen masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is a unique engin... more

East Side Highway, Between Ohanapecosh Entrance & Cayuse Pass, Longmire, Pierce County, WA

East Side Highway, Between Ohanapecosh Entrance & Cayuse Pass, Longmir...

Significance: Connecting with the Mather Memorial Parkway at Canyon Pass, the East Side Highway provides access to the park from southeastern Washington state and serves as an intra-state transportation artery.... more

Horse Trail Underpass, Beneath Going-to-the-Sun Road Northeast of West Glacier Entrance, West Glacier, Flathead County, MT

Horse Trail Underpass, Beneath Going-to-the-Sun Road Northeast of West...

Significance: The Horse Trail Underpass is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is sign... more

Avalanche Creek Bridge, Spanning Avalanche Creek at Going-to-the-Sun Road, West Glacier, Flathead County, MT

Avalanche Creek Bridge, Spanning Avalanche Creek at Going-to-the-Sun R...

Significance: The Avalanche Creek Bridge is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is sig... more

Gibbon River Bridge No. 2, Spanning Gibbon River at Grand Loop Road, Lake, Teton County, WY

Gibbon River Bridge No. 2, Spanning Gibbon River at Grand Loop Road, L...

Significance: Gibbon River Bridge II typifies the early design philosophy of the National Park Service, which was to use indigenous materials to harmonize manmade features with their natural surroundings. This... more

Otter Creek Bridge No. 2, Spanning Otter Creek at spur of Grand Loop Road, Lake, Teton County, WY

Otter Creek Bridge No. 2, Spanning Otter Creek at spur of Grand Loop R...

Significance: Otter Creek Bridge II typifies the early design philosophy of the National Park Service, which was to use indigenous materials to harmonize man-made features with their natural surroundings. This... more

Divide Creek Bridge, Spanning Divide Creek at Going-to-the-Sun Road, West Glacier, Flathead County, MT

Divide Creek Bridge, Spanning Divide Creek at Going-to-the-Sun Road, W...

Significance: The Divide Creek Bridge is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is signif... more

Paradise Hill Road, Between Hulls Cove & Park Loop Road, Hulls Cove, Hancock County, ME

Paradise Hill Road, Between Hulls Cove & Park Loop Road, Hulls Cove, H...

Significance: The last link in the park motor road system, the Paradise Hill Road allows visitors to enter the park without having to pass through the town of Bar Harbor. Designed as a scenic highway, the road... more

Pimmit Run Bridge, Pimmit Run, McLean, Fairfax County, VA

Pimmit Run Bridge, Pimmit Run, McLean, Fairfax County, VA

Significance: Built as part of a project to extend the GWMP closer to a proposed terminus at Great Falls, Virginia. Survey number: HAER VA-74 Building/structure dates: 1957-1959 Initial Construction Building... more

Route 123 Overpass, State Route 123 (Leesburg Road), McLean, Fairfax County, VA

Route 123 Overpass, State Route 123 (Leesburg Road), McLean, Fairfax C...

Significance: The Route 123 Overpass on the GWMP is reported to be the first prestressed concrete girder bridge built on the parkway and in the district. Survey number: HAER VA-73 Building/structure dates: 19... more

FHWA Creek Bridge, Spanning FHWA Creek at Northeast Entrance Road, Lake, Teton County, WY

FHWA Creek Bridge, Spanning FHWA Creek at Northeast Entrance Road, Lak...

Significance: FHWA Creek Bridge typifies the early design philosophy of the National Park Service, which was to use indigenous materials to harmonize manmade features with their natural surroundings. This phil... more

Roaches Run Culvert, Spanning Roaches Run, Arlington, Arlington County, VA

Roaches Run Culvert, Spanning Roaches Run, Arlington, Arlington County...

Significance: Roaches Run Bridge is one of twelve original bridge structures on the Mount Vernon Memorial Highway. Survey number: HAER VA-91 Building/structure dates: 1930-1932 Initial Construction

East Side Highway Tunnel, Through mountain spur on East Side Highway, Packwood, Lewis County, WA

East Side Highway Tunnel, Through mountain spur on East Side Highway, ...

Survey number: HAER WA-75 Building/structure dates: 1939 Initial Construction National Register of Historic Places NRIS Number: 97000344

Golden Stairs Retaining Wall, Beneath Going-to-the-Sun Road 43 miles Northeast of West Glacier Entrance, West Glacier, Flathead County, MT

Golden Stairs Retaining Wall, Beneath Going-to-the-Sun Road 43 miles N...

Significance: The Golden Stairs Retaining Wall is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road ... more

Pebble Creek Bridge, Spanning Pebble Creek at Northeast Entrance Road, Lake, Teton County, WY

Pebble Creek Bridge, Spanning Pebble Creek at Northeast Entrance Road,...

Significance: Pebble Creek Bridge typifies the early design philosophy of the National Park Service, which was to use indigenous materials to harmonize man-made features with their natural surroundings. This p... more

Snyder Creek Culvert, Spanning Snyder Creek at Going-to-the-Sun Road, West Glacier, Flathead County, MT

Snyder Creek Culvert, Spanning Snyder Creek at Going-to-the-Sun Road, ...

Significance: The Snyder Creek Culvert is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is signi... more

East Side Tunnel, Through Piegan Mountain at Going-to-the-Sun Road, West Glacier, Flathead County, MT

East Side Tunnel, Through Piegan Mountain at Going-to-the-Sun Road, We...

Significance: The East Side Tunnel is one of approximately seventeen prominent masonry and concrete structures on Going-to-the-Sun Road in Glacier National Park. The 51-mile stretch of scenic road is significa... more

St. Mary River Bridge, Spanning St. Mary River at Going-to-the-Sun Road, West Glacier, Flathead County, MT

St. Mary River Bridge, Spanning St. Mary River at Going-to-the-Sun Roa...

Significance: The St. Mary River Bridge is one of approximately seventeen prominent masonry and concrete structures on Going-to-the Sun Road in Glacier National Park. The 51-mile stretch of scenic road is sign... more

RWC Creek Bridge, Spanning RWC Creek at Northeast Entrance Road, Lake, Teton County, WY

RWC Creek Bridge, Spanning RWC Creek at Northeast Entrance Road, Lake,...

Significance: RWC Creek Bridge typifies the early design philosophy of the National Park Service, which was to use indigenous materials to harmonize man-made features with their natural surroundings. This phil... more

Little Hunters Beach Brook Bridge, Spanning Little Hunters Beach Brook on Park Loop Road, Seal Harbor, Hancock County, ME

Little Hunters Beach Brook Bridge, Spanning Little Hunters Beach Brook...

Significance: The Little Hunters Beach Brook Bride carries the Park Loop Road over its namesake stream in the Black Woods Section of the park. Wooden steps lead down from the bridge to the cobbled beach. Unpr... more

Lower Level Spout Run Bridge, Westbound, spanning Spout Run, Arlington, Arlington County, VA

Lower Level Spout Run Bridge, Westbound, spanning Spout Run, Arlington...

Significance: Built as part of the GWMP, this bridge is a late example of the continued use of the "rustic" style for parkway bridges. Survey number: HAER VA-80 Building/structure dates: 1957-1958 Initial Construction

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Paradise River Fourth Crossing Bridge, Spanning Paradise River on loop road in Paradise Park, Longmire, Pierce County, WA

Paradise River Fourth Crossing Bridge, Spanning Paradise River on loop...

Significance: The Fourth Crossing Bridge typifies the National Park Service's a "Rustic Style" of architecture through its use of a native granite veneer to conceal its reinforced concrete construction. Unproc... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Lower Level Spout Run Bridge, Westbound, spanning Spout Run, Arlington, Arlington County, VA

Lower Level Spout Run Bridge, Westbound, spanning Spout Run, Arlington...

Significance: Built as part of the GWMP, this bridge is a late example of the continued use of the "rustic" style for parkway bridges. Survey number: HAER VA-80 Building/structure dates: 1957-1958 Initial Construction

Paradise River Fourth Crossing Bridge, Spanning Paradise River on loop road in Paradise Park, Longmire, Pierce County, WA

Paradise River Fourth Crossing Bridge, Spanning Paradise River on loop...

Significance: The Fourth Crossing Bridge typifies the National Park Service's a "Rustic Style" of architecture through its use of a native granite veneer to conceal its reinforced concrete construction. Unproc... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Paradise River Fourth Crossing Bridge, Spanning Paradise River on loop road in Paradise Park, Longmire, Pierce County, WA

Paradise River Fourth Crossing Bridge, Spanning Paradise River on loop...

Significance: The Fourth Crossing Bridge typifies the National Park Service's a "Rustic Style" of architecture through its use of a native granite veneer to conceal its reinforced concrete construction. Unproc... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer County, CO

Trail Ridge Road, Between Estes Park & Grand Lake, Estes Park, Larimer...

Significance: Trail Ridge Road has national, state, and local significance as an engineering feat -the highest continuous highway in the United States and for its role in the development of the Rocky Mountain N... more

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Crater Lake National Park Roads, Klamath Falls, Klamath County, OR

Significance: The primary roads in Crater Lake National Park were designed and constructed to provide visitor access to the park's scenic features, which are largely concentrated along the rim of Crater Lake. ... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Acadia National Park Motor Roads, Bar Harbor, Hancock County, ME

Significance: Motorists visiting Acadia National Park enjoy a variety of experiences on the park's acclaimed road system. The principal park road is the Park Loop Road, a 20-mile circuit around the eastern hal... more