An open-water predator in the big I-5 reservoirs. They eat trout-sized meals and show as boils or meter marks, not as dock fish.
Open water and dam-area bait balls in the big reservoirs — Castaic (upper lake) and Pyramid especially.
Inland striped bass: generally two fish, 18 inches — except the Southern District (which includes Los Angeles County) is 10 fish and no size limit (T14 CCR §5.75(d)). That is the rule that applies at Castaic and Pyramid. Troll swimbaits and spoons that look like trout or shad. Ocean striped bass are a different section.
Lake Elsinore is carved out of the Southern District exception — not an LA water. Ocean striper rules differ.
T14 CCR §5.75 striped bass (Southern District exception) →
Independent-site disclaimer: this summary is for orientation only and can change in-season. Confirm with CDFW before you keep a fish. Fish in LA is not affiliated with the California Department of Fish and Wildlife.