Acalanes Ridge is comprised of 177 acres offering sweeping ridge top vistas of Mt. Diablo and the Carquinez Strait as well as lush riparian hikes along Sylvan Creek. There are trailheads on Pleasant Hill Road just north of Reliez Valley Road and on Sousa Drive. Trail map http://www.ci.walnut-creek.ca.us/pdf/map.acalanes%20ridge.pdf