Quarry Lakes Recreation Area, located in the Bay Area, features three lakes formed from old gravel quarries (hence the name).The standout is Horseshoe Lake, regularly stocked with rainbow trout by the CDFW during the cooler months. It also boasts an excellent warm water fishery, home to both largemouth and smallmouth bass, along with catfish, bluegill, and carp. Only non-gas-powered boats, either electric or manually operated, are permitted, with a modest launch area available.

Horseshoe Lake’s neighbor, Rainbow Lake, is open for fishing, though it doesn't receive the same attention or regular stockings as Horseshoe. Lago Los Osos serves as a wildlife preserve and is strictly off-limits for fishing.

Be aware that there are fees associated with both day use and boat launching. Also, the use of lead weights is prohibited at all times.