Henry W. Coe State Park (often known simply as Henry Coe or Coe Park) is a state park of California, United States, preserving a vast tract of the Diablo Range. The park is located closest to the city of Morgan Hill, and is located in both Santa Clara and Stanislaus counties. The park contains over , making it the largest state park in northern California, and the second-largest in the state (after Anza-Borrego Desert State Park). Managed within its boundaries is a designated wilderness area of about . This is officially known as the Henry W. Coe State Wilderness, but locally as the Orestimba Wilderness. The park was established in 1959. History Prior to its use as ranch land, the Diablo Range backcountry now covered by Henry W. Coe State Park was traversed by La Vereda del Monte, a trail between Point of Timber on the Sacramento River Delta and Cantua Creek in the San Joaquin Valley. Joaquin Murrieta and his gang used the route to drive wild or stolen horses south from Contra Costa County, picking up more from stations along the way, passing into the area of the park from the San Antonio Valley via a trail that closely followed the route of County Line Road along the divide of the Diablo Range. Horses were held at several locations now contained within the park, including Valle Atravesado (now flooded by Mississippi Lake), Valle Hondo, site of Pacheco Camp, Paradise Flat and Mustang Flat. Both Mustang Peak and Mustang Flat derive their names from the activities of Murrieta and his gang. Mustang Peak is where the horses held at Paradise Flat or Mustang Flat were fed into a passing drove. The park began as the Pine Ridge Ranch, a private cattle ranch of . It was the home of Henry Willard Coe, Jr. and his family from 1905 until his death in 1943. Coe left the ranch to his son, Henry Sutcliffe Coe, who sold it to the Beach Land and Cattle Company of Fresno County in 1948. The ranch's road network was greatly expanded during this time. Coe's daughter, Sada Sutcliffe Coe Robinson, re-purchased the ranch in 1950 and donated it to Santa Clara County in 1953, when it became Henry Willard Coe County Park. It became a state park in 1958. Additional adjacent lands were added, and for many years, the park's size stood at . Indeed,