San Juan Mountains
The San Juan Mountains are a rugged mountain range in the Rocky Mountains in southwestern Colorado. The area is highly mineralized (the Colorado Mineral Belt) and figured in the gold and silver mining industry of early Colorado. Major towns, all old mining camps, include Creede, Lake City, Silverton, Ouray, and Telluride. Large scale mining is now uneconomical in the region, although independent prospectors still work claims throughout the range. The last large scale holdouts were the Standard Metals operation near Silverton, which operated until late in the 20th century and the Idarado Mine on Red Mountain Pass that closed down in the 1970s. Another hold-out was the ill-fated Summitville mine on the eastern slope of the San Juans.
The Summitville mine was the scene of a major environmental disaster in the 1990s when the hastily installed liner of a cyanide-laced tailing pond began leaking heavily. Summitville is in the Summitville caldera, one of many extinct volcanoes making up the San Juan volcanic field. One, the La Garita Caldera, is 35 miles (56 km) in diameter. Large beds of lava, some extending under the floor of the San Luis Valley, are characteristic of the eastern slope of the San Juans.
There is some tourism in the region, with the narrow gauge railway between Durango and Silverton being an attraction in the summer. Jeeping is popular on the old trails which linked the historic mining camps, including the notorious Black Bear Road. Visiting old ghost towns is popular, as is wilderness trekking and mountain climbing. The San Juans are extremely steep; only Telluride has made the transition to ski resort. Purgatory (now known as Durango Mountain Resort) is a small ski area north of Durango near the Tamarron Resort. There is also skiing on Wolf Creek Pass at the Wolf Creek ski area. Recently Silverton Mountain ski area has begun operation in Silverton. It is a highly rated extreme ski area. Early and late season unguided skiing is possible but for most of the year it is guided skiing only.
The Rio Grande rises on the east side of the range. The other side of the San Juans, the western slope of the continental divide, is drained by tributaries of the San Miguel, Dolores and Gunnison rivers, which all flow into the Colorado River.
The San Juan and Uncompahgre National Forests cover a large portion of the San Juan Mountains.
*From www.wikipedia.com