Red Mountain Pass elevation 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 migration, human a ...

in the

San Juan Mountains The San Juan Mountains is a high and rugged mountain range in the Rocky Mountains in southwestern Colorado and northwestern New Mexico. The area is highly mineralized (the Colorado Mineral Belt) and figured in the gold and silver mining industry ...

of western

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 t ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. The pass straddles a divide that separates Ouray and San Juan counties. The pass is named for the nearby Red Mountain on the northeast side of the pass. The name is derived from the iron oxide laden rock that forms their slopes. The pass separates the Uncompahgre and Las Animas River watersheds, and also serves as a dividing point between the Uncompahgre and San Juan National Forests. The pass is traversed by the

Million Dollar Highway U.S. Route 550 (US 550) is a spur of U.S. Highway 50 that runs from Bernalillo, New Mexico to Montrose, Colorado in the western United States. The section from Silverton to Ouray is frequently called the Million Dollar Highway.

, U.S. Highway 550 between Ouray and Silverton, which is part of the

San Juan Skyway Scenic Byway The San Juan Skyway Scenic and Historic Byway is a All-American Road, National Forest Scenic Byway, and Colorado Scenic and Historic Byway located in Dolores, La Plata, Montezuma, San Juan, and San Miguel counties, Colorado, ...

. The pass is known for being treacherous in the wintertime due to the steep 8%

grade Grade most commonly refers to: * Grade (education), a measurement of a student's performance * Grade, the number of the year a student has reached in a given educational stage * Grade (slope), the steepness of a slope Grade or grading may also ref ...

and switchbacks on the north side facing Ouray, though the entire road is paved. Avalanches are frequent, and can block the highway for some time. The lower part of the pass towards Ouray is blasted into near-vertical cliffs of quartzite hundreds of feet above Red Mountain Creek and the Uncompahgre River. This section of road is winding, narrow and has no shoulder.

Mining district

The Red Mountain Mining District lies from the divide northward to Ironton Park, halfway down towards Ouray. It was the site of a historic silver boom from 1882 until 1893, including the Yankee Girl and National Belle. Head frames of the old workings are still visible from the highway, as are the remains of the three largest communities: Red Mountain Town, Ironton, and Guston.Smith, P. David, (2004) "Mountains of Silver; Life in Colorado's Red Mountain Mining District": Western Reflections Publishing Co. The sprawling

Idarado Mine The Idarado Mine was a mining operation in the San Juan Mountains of Ouray County, Colorado near the now-ghost town of Guston, producing primarily lead, silver and zinc along with lesser amounts of gold and copper. The mine is within the S ...

(Treasury Tunnel) continued digging until the 1970s, and reclamation of

tailings In mining, tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are different to overburden, which is the waste rock or other material that overlie ...

is ongoing. RedMountainPassroad

References

{{reflist Mountain passes of Colorado San Juan Mountains (Colorado) U.S. Route 50 Landforms of Ouray County, Colorado Landforms of San Juan County, Colorado Transportation in Ouray County, Colorado Transportation in San Juan County, Colorado San Juan National Forest Uncompahgre National Forest