English Ohlone Wilderness
Ohlone Wilderness is a 9,737 acres (39.40 km2) regional park in the United States that is part of the East Bay Regional Parks (EBRPD) system. It is located in southern Alameda County, near the cities of Fremont, CA and Sunol, CA. It is located between Mission Peak (to its west) and Sunol Regional Wilderness (to its east).
The wilderness is accessible only via the 29 miles (47,000 m) long Ohlone Wilderness Trail, which connects Del Valle Regional Park (Livermore), Sunol Regional Wilderness (Sunol) and Mission Peak Regional Preserve (Fremont).
The wilderness can be traversed only on foot or on horseback. EBRPD states that trail bicycles and motor vehicles are not allowed.The Ohlone Wilderness Trail passes through two areas that belong to the San Francisco Water Department. Trail users are warned that they must remain within the trail boundaries in these areas. Otherwise, they may be cited and fined for trespassing on SFWD property and potentially jeopardize public use of the corridors.
Source: Ohlone Wilderness
English Ohlone Trail
This is a very long, difficult trail that goes through the mountainous country south of Pleasanton and Livermore. The trail itself is accessible from Del Valle Regional Park and then continues through several canyons and mountain ridges for many miles, passes through Sunol Regional Wilderness, and then eventually goes to Mission Peak and Fremont. If you want to do the whole trail, the smartest thing to do would probably be to camp somewhere along the trail and make it a two- or three- day journey.