Fishing at Lake San Marcos, San Diego County, California

• Overview

  San Diego County in California is where Lake San Marcos sits. It stands 512 feet above sea level. It runs to roughly 56 acres — big enough to hold fish away from the bank, small enough to learn. By elevation it sits in the lower part of our California listings. Start from Lake San Marcos, 0.5 miles down the road. Further out sit San Marcos (2.9 miles) and Vista (5.9 miles). The nearest boundary is well away, so one set of rules covers the water.

• Where to Fish on Lake San Marcos

  Our records hold no depth for this water. Rip-rap along the wall holds fish that the open bank never does. The old creek line under the surface is the feature worth finding. Open occurrence data for the surrounding area lists green sunfish, bluegill, black bullhead, yellow bullhead and flathead grey mullet. It reflects what has been logged, which depends on who was looking. Read Lake San Marcos for ten minutes before the first cast goes out.

• Seasonal Patterns

  Average temperature peaks around 73°F in August and bottoms out near 55°F in January. Cold never shuts this water down; heat is the only limit. Season rules are a separate question. Heat pushes fish deep from June onwards, so start early. March through May is the strongest run, with October and November a second stretch. Expect Lake San Marcos to follow that timing.

• Tackle & Baits

  Whether you may fish here is not something records settle. Parking sits half a mile out, which makes for a walk with tackle. Public toilets are recorded roughly half a mile off. Catfish want bait on the bottom: cut bait or worms, a simple running rig, and patience after dark. A landowner's word beats anything printed elsewhere. Some stretches are reserved and marked as such on the ground. Should this one be busy, Olivenhain Reservoir is 5.3 miles off. Treat Lake San Marcos as unsettled until someone local tells you otherwise.