The Stanislaus National Forest manages 898,099 acres of land in four counties in the Sierra Nevada in Northern California. The forest is located primarily in eastern Tuolumne County, adjacent to the northwestern part of Yosemite National Park, but parts of it extend (in descending order of forestland area) into southern Alpine, northern Mariposa, and eastern Calaveras counties. Pets are allowed in the forest but must always be restrained or on a leash while in developed recreation sites. Pets are not allowed in swimming areas.
More information on the Stanislaus National Forest pet policy
