Auto Tour Route - Idaho
Below the map are suggested driving directions to follow the Auto Tour Route for the California National Historic Trail west through Idaho, from Wyoming to Utah and Nevada.
From Wyoming to Nevada:
From Wyoming to Utah:
Total original route miles in Idaho (including alternate routes): 457
Did You Know?
Until discovered by William Sublette in the 1830s, most Americans thought the Rocky Mountains were impassable. Lewis and Clark passed through the Rockies north of this location, via the Missouri River in 1805. More...