The Santa Rosa and San Jacinto Mountains National Monument is a National Monument in southern California. It includes portions of the Santa Rosa and San Jacinto mountain ranges, the northernmost ones of the Peninsular Ranges system. The national monument covers portions of Riverside County, west of the Coachella Valley, approximately 100 miles (160 km) southeast of downtown Los Angeles. The Santa Rosa and San Jacinto Mountains National Monument is managed by a mosaic of entities, including the Bureau of Land Management (89,500 acres (362 km2)), US Forest Service (65,000 acres (260 km2)), Cahuilla peoples (19,800 acres (80 km2)), California Department of Parks and Recreation (12,900 acres (52 km2)), other State of California agencies (36,400 acres (147 km2)), and privately (38,500 acres (156 km2)). Most of the common recreational uses of hiking, mountain biking, horseback riding and camping are allowed, with the exception of special areas such as ecological reserves and essential bighorn sheep habitat. The Pacific Crest Trail traverses the western part of the national monument and is one of the nation’s first National Scenic Trails established by the National Trails System Act (Public Law 90-543). This segment of the trail is managed by the US Forest Service and Bureau of Land Management through a Memorandum of Understanding (MOU).