This is the County of San Diego, Department of Parks and Recreation polyline DPR_Trails layer. This layer is based on park ranger first-hand knowledge, some GPS records, and some aerial imagery. Only those trails that reside inside the Department of Parks and Recreation park-specific owned, co-owned, leased, funded or cooperatively managed park units. Those trails that are outside of park boundaries may represent trails in other jurisdictions, but only those located within park boundaries are valid for public use.