(Two Rock, 1857, CA-49-04) WNW of Petaluma, Sonoma County, CA. Western Av. SW 1.9 miles from jct with Petaluma Blvd in Petaluma, continue SW (curves NW) on Spring Hill Rd. 5.1 miles to the house on the W. side of the road at 3925. (N38 14.538 W122 45.164) Photo by Peter King 9-18-09.

Photo by Vanessa Pritchard 07-2005, submitted by Robert Kline.