Another Rancho San Antonio cache, this one near the Hidden Villa border. Climbing Black Mountain is my all-time favorite workout hike, and the Rhus Ridge parking lot is a good starting point. This cache is a short detour off the Black Mountain trail. Hidden Villa is also lovely, when open.
Beautiful hillside view:

This cache is about two miles and 1000 feet of elevation gain from the Rhus Ridge parking lot. Note, there is limited parking.
Bring your own pen capable of signing a Rite in the Rain fanbook. Coordinates are the average of three measurements.
Congratulations to Chet13 for the FTF!