Donner Summit Poster State Park Dry Tortugas was declared a

Dry Tortugas was declared a national monument on January 4

When Grosvenor finally visited Utah in 1932

According to legend

lived here until around 1175 A

Among the ancient fossilized trees of a prehistoric forest

Donner Summit Poster State Park Dry Tortugas was declared aProduct Details 14 x 22 poster Interpretive Copy Said to have eliminated for all time the terrors of the Donner grade, Rainbow Bridge facilitated better passage over the Sierra Nevadas. Before the bridge and connecting highway were built, 18% grades plagued motorists who braved this steep stretch of the Lincoln Highway. When it opened to traffic in 1926, the bridge ushered in a new era of smooth travel over what became California US Highway 40.