Fremont Pass is a

mountain pass A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and both human and animal migrat ...

in central

Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the ...

, in the

Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in straight-line distance from the northernmost part of western Canada, to New Mexico in ...

of the western United States. It forms the

continental divide A continental divide is a drainage divide on a continent such that the drainage basin on one side of the divide feeds into one ocean or sea, and the basin on the other side either feeds into a different ocean or sea, or else is endorheic, not c ...

on the border between Lake County and Summit County. The pass is named for

John C. Frémont John Charles Frémont or Fremont (January 21, 1813July 13, 1890) was an American explorer, military officer, and politician. He was a U.S. Senator from California and was the first Republican nominee for president of the United States in 1856 ...

, an explorer of the

American West The Western United States (also called the American West, the Far West, and the West) is the region comprising the westernmost states of the United States. As American settlement in the U.S. expanded westward, the meaning of the term ''the Wes ...

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 The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid watershed that encompasses parts of seven U.S. sta ...

, with the headwaters of the

Arkansas River The Arkansas River is a major tributary of the Mississippi River. It generally flows to the east and southeast as it traverses the U.S. states of Colorado, Kansas, Oklahoma, and Arkansas. The river's source basin lies in the western United Stat ...

to the south. The pass summit is the site of Climax Mine, a

molybdenum Molybdenum is a chemical element with the symbol Mo and atomic number 42 which is located in period 5 and group 6. The name is from Neo-Latin ''molybdaenum'', which is based on Ancient Greek ', meaning lead, since its ores were confused with l ...

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.

Railway

The

Denver, South Park and Pacific Railroad The Denver, South Park, and Pacific Railroad (later called the Denver, Leadville and Gunnison Railway) was a historic narrow gauge railroad that operated in Colorado in the western United States in the late 19th century. The railroad opened up the ...

built a

narrow gauge A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge narrower than standard . Most narrow-gauge railways are between and . Since narrow-gauge railways are usually built with tighter curves, smaller structur ...

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 The Colorado and Southern Railway was an American Class I railroad in the western United States that operated independently from 1898 to 1908, then as part of the Chicago, Burlington and Quincy Railroad until it was absorbed into the Burlin ...

. Operating ended in 1937. The line south of

Climax Climax may refer to: Language arts * Climax (narrative), the point of highest tension in a narrative work * Climax (rhetoric), a figure of speech that lists items in order of importance Biology * Climax community, a biological community tha ...

is retained, converted to in 1943 and now operated by Leadville, Colorado and Southern Railroad. A second narrow gauge railway line was built by

Denver and Rio Grande Railroad Denver () is a consolidated city and county, the capital, and most populous city of the U.S. state of Colorado. Its population was 715,522 at the 2020 census, a 19.22% increase since 2010. It is the 19th-most populous city in the Unite ...

in 1881. Passenger service ceased in late 1909 and the last sporadic freight service in November 1910. The line was abandoned on 1 December 1923.

Electrical Power

In 1909, the Shoshone Transmission Line was built to connect a

generating station A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid. Many pow ...

near

Glenwood Springs Glenwood Springs is a home rule municipality that is the county seat of Garfield County, Colorado, United States. The city population was 9,963 at the 2020 United States Census. Glenwood Springs is located at the confluence of the Roaring Fork ...

with

Leadville The City of Leadville is a statutory city that is the county seat, the most populous community, and the only incorporated municipality in Lake County, Colorado, United States. The city population was 2,602 at the 2010 census and an estimated ...

and

Denver Denver () is a consolidated city and county, the capital, and most populous city of the U.S. state of Colorado. Its population was 715,522 at the 2020 census, a 19.22% increase since 2010. It is the 19th-most populous city in the United ...

. This historic electric transmission line has been modernized several times and is still in use, although the development of the Climax mine has caused major changes to the line in the vicinity of the pass.

References

External links

USGS TopoZone listing
Rail mountain passes of the United States Mountain passes of Colorado Landforms of Lake County, Colorado Denver and Rio Grande Western Railroad Transportation in Lake County, Colorado {{Colorado-geo-stub