A vast Southern Rockies national forest covering most of the western slope of Colorado's San Juan Mountains.
San Juan National Forest
San Juan National Forest is a large U.S. National Forest in western Colorado, covering more than 1.8 million acres across ten counties from Durango and Pagosa Springs south toward the New Mexico border. The forest encompasses most of the southern portion of the San Juan Mountains west of the Continental Divide, an alpine and subalpine landscape of high peaks, deep canyons, dense conifer forests, broad mesa country, and the headwaters of several major river systems. Its scale and ecological diversity make it one of the most significant national forests in the Southern Rockies, supporting large wilderness tracts, multiple wilderness areas, scenic byways, and a long history of human use from ancestral Puebloan sites to 19th-century mining boomtowns.
The forest is administered by the U.S. Forest Service, with its headquarters in Durango and ranger districts in Bayfield, Dolores, and Pagosa Springs. Designated in 1905 by President Theodore Roosevelt, San Juan National Forest has long been recognized for its blend of rugged mountain scenery and accessible Southwestern Colorado landscapes. It borders the Uncompahgre National Forest to the north and the Rio Grande National Forest to the east, and its wilder corners include some of the most remote terrain in the lower 48 states.
Although very large and heavily forested, San Juan National Forest is also known for cultural sites, alpine recreation, and the historic Durango and Silverton Narrow Gauge Railroad, whose route threads through the heart of the forest. The forest has also gained modern recognition through national monument designations at Chimney Rock, preserving ancestral Puebloan archaeological landscapes that complement the surrounding natural environment.
