Fremont Pass (Colorado)

Fremont Pass
Fremont Pass and the Climax mine
Elevation	11,318 ft (3,450 m)
Traversed by	State Highway 91
Location	Lake County, Colorado, United States
Range	Rocky Mountains
Coordinates	39°21′59″N 106°11′12″W / 39.36639°N 106.18667°W / 39.36639; -106.18667
Topo map	USGS Climax

Fremont Pass is a 11,318-foot (3,450 m) mountain pass in the Rocky Mountains of central Colorado in the United States.

It forms the continental divide on the border between Lake County and Summit County. The pass is named for John C. Frémont, an explorer of the American West who discovered the pass while traversing present-day Colorado during the 1840s. The pass provides a route between the upper valley of the Blue River, a tributary of the Colorado River, with the headwaters of the Arkansas River to the south. The pass summit is the site of Climax Mine, a molybdenum mine. The pass is traversed by State Highway 91.

Despite being one of the highest mountain passes in the state, the only steep part is the switchback on the final ascent toward the Climax mine on the south side. The rest of the pass is gentle.

The Denver, South Park and Pacific Railroad built a narrow gauge railway over Fremont Pass in 1884. It was sold in foreclosure proceedings to the Denver, Leadville & Gunnison Railroad in 1889 and became later part of the Colorado and Southern Railway. Operating ended in 1937. The line south of Climax is retained, converted to standard gauge 1943 and now operated by Leadville, Colorado and Southern Railroad.