(Alum Rock Park #1) across Penitencia Creek in Alum Rock Park NE of San Jose, Santa Clara County, CA. Alum Rock Av. N. 3.0 miles from jct with I680 exit 1 to the park entrance. Continue on Alum Rock Av. (becomes Alum Rock Falls Rd.) 1.2 miles to the visitor center on the S. side of the road. Drive E. & curves N. on Penitencia Creek Rd. 0.1 miles from the visitor center to the bridge on the left side of the road. (5-9-09, N37 23.852 W121 47.841) Photo by Mark Comstock.