Topografische Karte Great Sand Dunes National Park

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Name: Topografische Karte Great Sand Dunes National Park, Höhe, Relief.

Ort: Great Sand Dunes National Park, Saguache County, Colorado, United States (37.66273 -105.72821 37.92629 -105.49781)

Durchschnittliche Höhe: 2.616 m

Minimale Höhe: 2.292 m

Maximale Höhe: 4.100 m

In 1848, John C. Frémont was hired to find a railroad route from St. Louis to California. He crossed the Sangre de Cristos into the San Luis Valley in winter, courting disaster but proving that a winter crossing of this range was possible. He was followed in 1853 by Captain John Gunnison of the Corps of Topographical Engineers. Gunnison's party crossed the dunefield on horseback.[11]