Eldorado National Forest
Eldorado National Forest is a U.S. National Forest located in the central Sierra Nevada mountain range, in eastern California. Geography. Most of the forest (72.8%) lies in El Dorado County. In descending order of land area the others counties are: Amador, Alpine, and Placer counties in California; and Douglas County in Nevada with . The forest is bordered on the north by the Tahoe National Forest, on the east by the Lake Tahoe Basin Management Unit, on the southeast by the Humboldt-Toiyabe National Forest, and to the south by the Stanislaus National Forest. Eldorado National Forest headquarters  are located in Placerville, California. There are local ranger district offices in Camino, Georgetown, Pioneer, and Pollock Pines. Land ownership. A complicated ownership pattern exists. The parcels of Other Ownership (private or other Agency land) are mostly isolated and surrounded on all sides by government land. An opposite pattern occurs outside of the Forest Boundary where several small scattered pieces of National Forest lands are separated from the main body and surrounded by lands of Other Ownership. Elevations. The Forest ranges in elevation from in the foothills to more than above sea level along the Sierra crest. The mountainous topography  is broken by the steep canyons of the Mokelumne, Cosumnes, American, and Rubicon rivers. Plateaus of generally moderate relief are located between these steep canyons. Wilderness areas. The Desolation Wilderness is located within the forest's boundaries, as is most of the Mokelumne Wilderness (which extends into neighboring Stanislaus National Forest and Humboldt-Toiyabe National Forest). Climate. A cool montane version of Mediterranean climate extends over most of the forest with warm, dry summers and cold, wet winters. Ecology. Vegetation. A wide variety of hardwoods, conifers, shrubs, native grasses, and forbs are represented in the various Eldorado National Forest ecosystems . The principal plant communities found here are: Old-growth forests totaling have been identified in the Eldorado National Forest, consisting of: Logging. The major commercial Forest species are White Fir, Red Fir, Ponderosa Pine, Jeffrey pine, Sugar Pine, Douglas Fir, and Incense Cedar. Water. Water is a major resource of the Eldorado National Forest. The forest receives about of precipitation annually. Average annual runoff is about . This is equal to an annual water yield of per acre (737,000 m³/km²); therefore National Forest lands yield an estimated annually. Transportation. The Eldorado National Forest has a high density of transportation routes, with  of roads, and of trails. Roads under Forest Service jurisdiction total . There are of county roads, and of private roads within the National Forest boundaries. History. The forest was established on July 28, 1910 from a portion of Tahoe National Forest and other lands. The forest was formed by the last ice age.