From the bloggers at Rolling in a RV.
Immigrants following the California Trail traveled along the Humboldt River through Utah and Nevada. At Carlin Canyon the river carved through a small mountain and made a horseshoe loop.
This is the path that the Bartleson–Bidwell Party, the first wagon train along the California Trail, used. It’s also the path of the ill-fated Donner Party. In 1869 the transcontinental railroad ran through the canyon. After train tunnels were blasted into the mountain in 1903 the rail bed became a highway. Addition tunnels were blasted for I-80 in 1975 and the loop was closed to through traffic.
To read the full story by Rolling in a RV, click here.