Start: Castle Rock Road & Old Briones Rd. Walnut Creek, CA.

GPS Coordinates: N 37 53.509 W 122 00.168

Directions from Hwy 24 & 680 take 680 North to Treat Blvd. Exit at Treat.

Make a right onto Bancroft (after about 3/4 mile); Bancroft becomes Walnut Avenue, stay on Walnut Avenue to the end, make a right on Castle Rock Rd. go south until you see a gate on the right side that says Old Briones Rd. Go right here up hill and park at first picnic area.

Warning: It could be hot & not a lot of shade.