Del Valle Regional Park 
7000 Del Valle Rd.
Livermore, CA 94550
888-327-2757
http://www.ebparks.org/parks/del_valle
Park: Bike, Fish, Hike, Horse, Picnic, Walk, Water Sports
Deep in a valley framed by oak-covered hills, with sailboats and sailboards skimming over its waters, Del Valle is like an alpine resort only 10 miles south of Livermore. Centerpiece of the park is a lake five miles long with all kinds of water-oriented recreation, surrounded by 3,997 acres of beautiful land for hiking, horseback riding, and nature study. Del Valle also is the eastern gateway to the Ohlone Wilderness Trail, 28 miles of scenic back country trail. Operated by the East Bay Regional Park District.