Castaic Lake offers multiple access points with three designated trail areas for hiking, mountain biking, and equestrian use, plus boat launch facilities at the West, East, and Lagoon ramps with amenities including boat rentals, restrooms, and a tackle shop.

The recreation area features over 7 miles of trails with scenic overlooks, designated swimming beaches at the lower lagoon, and camping facilities available year-round (sunrise to sunset, closed Mondays/Tuesdays as of June 2025).

Daily entry fees apply ($15 for vehicles, $13 for motorized boats), with various rules including counter-clockwise boating direction, speed limits (35 mph maximum, 5 mph in coves), and specific restrictions for personal watercraft and fishing.