Excellent trails.
Coyote Hills is at the west end of Patterson Ranch Road/Commerce Drive in Fremont. From I-880, take Highway 84 west, exit at Paseo Padre Parkway, turn right, and drive north about one mile. Turn left on Patterson Ranch Road. This is the park's entrance road and will take you to the picnic areas and visitor center. Parking fees may apply.
http://www.tripleblaze.com/trail.php?c=3&i=6980