Trip date: June 10, 2018
Caltopo map here: caltopo.com/m/BEPS
My original plan was a much longer loop that would hit Button Rock Mountain, Coulson Gulch and then return alongside the north side of Ralph Price Reservoir. This was going to involve a short bushwhack up onto a hill to gain access to Button Rock Mountain. There were some trails indicated on Caltopo's "MapBuilder Topo" map layer that I had planned on using near the start but on the drive in it was pretty obvious it was actually private property. The route turned out being a little shorter than expected but was still fun.
From here I headed over towards Coulson Gulch (on National Forest land) and passed through a peaceful, green valley at the edge of the Button Rock Preserve.