Rancho Polhemus

Tucked away in the San Mateo Hills is a hidden treasure: Rancho Polhemus. In sight of suburban back yards, but hidden from the road, this tiny jewel of a ranch is nestled in a green belt area. Periodically, passers-by catch tantalizing glimpses of horses out to pasture, or see small groups of trail riders traveling Polhemus Road en route to the wonderful dirt trails adjacent to Crystal Springs Reservoir. (Source)