East Bay Casual Hikers outing starting at the staging area on Arroyo Rd. near the dam for the Del Valle reservoir. We hiked up the hill north of the dam and continued along the north side of the lake. Our return was along a similar path with a couple diversions where there was an alternate route nearer to the water. The last 1.4 miles of the tracklog got corrupted and doesn't appear here but was on the same path as we used at the start.