Wyoming

The South Pass was the doorway through the Rockies for emigrants on the Oregon Trail. First discovered in 1813, then rediscovered by the mountain man Jedediah Smith in 1824, it was vital to transcontinental travel until the completion of the railroad in 1869.
Wyoming WY Map WY Large Map Devils Tower Fort Laramie Fort Phil Kearney Green River Independence Rock Muskrat Creek North Platte River Rock Springs South Pass Sweetwater River Wind River Mountains Yellowstone Park