Klamath National Forest is a 1,737,774-acre national forest, in the Klamath Mountains and Cascade Range, located in Siskiyou County in northern California, but with a tiny extension into southern Jackson County in Oregon. The forest contains continuous stands of ponderosa pine, Jeffrey pine, Douglas fir, red fir, white fir, lodgepole pine, Baker Cypress, and incense cedar. Old growth forest is estimated to cover some 168,000 acres of forest land.