Donner Pass Train Poster Sunset the dam is 660 feet

the dam is 660 feet thick narrowing to 45 feet at the top

a road over the high Sierras became important

protect and be inspired by the red sandstone canyons and monuments

The verdant valley

Long before a network of automobile highways crisscrossed the nation

Donner Pass Train Poster Sunset the dam is 660 feetDescription 14" x 22" poster Interpretive Copy Americas first transcontinental railroad was completed in 1869. The most difficult portion of the track to build was through the Sierra Nevada Mountains and over the 7,056 foot summit of Donner Pass. The 1,659 foot long Summit Tunnel, four additional tunnels, miles of snow sheds, and two Chinese Walls were also exceptionally challenging to build. Much of the same route carved out of the granite cliffs