The Humboldt-Toiyabe National Forest (HTNF) is the principal U.S. National Forest located in the U.S. state of Nevada. With an area of 6,300,000 acres (2,550,000 ha), it is the largest National Forest of the United States outside of Alaska. It does not resemble most other National Forests in that it has numerous fairly large but non-contiguous sections scattered about most of the state of Nevada and a portion of eastern California. Its 10 ranger districts are scattered across the many mountain ranges in Nevada, from the Santa Rosa Range in the north to the Spring Mountains near Las Vegas in the south. A small part of the forest (about 11%) is actually in eastern California, in the areas around Bridgeport and Markleeville and other areas east of the Sierra Nevada mountains. The forest lies in 13 counties in Nevada and 6 in California. The counties with the largest amount of forest land are Nye, Elko, and White Pine in Nevada, and Mono County in California, but there are 15 other counties with land in this widely dispersed forest. Forest headquarters are located in Sparks, Nevada.