Water Dog Lake Park features 20 miles of hiking trails near Belmont, CA.
From U.S. 101, take Ralston Av. west, past El Camino Real and The Alameda de las Pulgas. Just past this last street, keep your eyes open for Lyall Way on the left, just as the road begins to climb. Turn left on Lyall. You will come to a stop sign at Lake Road. Park on the left side of Lyall just past this stop sign. The entrance to Water Dog Lake is at the corner. A newer (and probably better) place to park is the parking lot at the end of Carlmont Drive. To reach this, turn left on Lake, then right onto Carlmont. Carlmont will dead-end at the parking lot. <br />
http://www.tripleblaze.com/trail.php?c=3&i=107