Independent site. Not affiliated with any state park agency or the National Park Service. Book only on the official sites.
California ParkReservations

Campgrounds

Campground booking guides

The campgrounds that sell out first, each with its own date tool and a plan for when it's full.

Full park guides

These state beaches and parks have their own guide sites, by the same team, each with a booking-day tool for its campground. They follow California's 6-month, 8 a.m. rule.