Berthoud Pass, Mountain pass in Colorado, United States.

Berthoud Pass is a steep mountain pass on U.S. Highway 40 that separates Clear Creek and Grand counties. The road winds upward through numerous switchbacks, connecting both sides of the Rocky Mountains.

Edward Berthoud discovered this passage in 1861 while surveying for the Colorado Central Railroad. He determined the route was suitable for wagons but not for rail transport.

The pass takes its name from Edward L. Berthoud, who found it in July 1861 with guide Jim Bridger while surveying a railroad route. The summit holds a marker sign and a warming hut opened in May 2008, and the closed ski area's lifts were removed in 2003.

The road remains accessible year-round, though it is regularly cleared of snow during winter months. Visitors should prepare for steep grades and potentially challenging conditions during colder seasons.

The pass's name honours Edward L. Berthoud, who found the route in July 1861 with guide Jim Bridger while surveying for the Colorado Central Railroad. He judged it fit for wagons, not trains, and was then hired to survey a road onward to Salt Lake.