How to Book ReserveCalifornia: Cancellations, Release Times and Alerts
How ReserveCalifornia works
ReserveCalifornia (reservecalifornia.com) is the official booking system for California State Parks — trail camps, cabins, environmental camps and the drive-up campgrounds all run through it. This page is PermitSnag's guide to booking on it, not the booking system itself; when you're ready to reserve, you'll do it directly on reservecalifornia.com.
When cancellations show up
Sites open on ReserveCalifornia's own booking window, and the exact date varies by park — the park's own page on reservecalifornia.com is the source for that. What doesn't vary is what happens after a booking window opens: sites fill, plans change, and cancellations go straight back onto the calendar. PermitSnag watches the trail camps, cabins and campgrounds you tell it to and texts or emails you the moment one opens up, so you're not the one refreshing the page.
How a PermitSnag watch helps
A PermitSnag watch checks ReserveCalifornia on your behalf and texts or emails you the moment a cancellation lands, so you are not the one refreshing the page. Set a watch on any permit or campground you can reach from the links below, or search for it from the full permit directory.
What we watch here
Permits we watch on ReserveCalifornia
- Steep Ravine Cabins availability
- Lower Moro Campground availability
- Castle Rock Trail Camp availability
Campgrounds we watch on ReserveCalifornia
Wiring last verified 2026-09-10.
ReserveCalifornia is a trademark of California State Parks. PermitSnag is an independent service and is not affiliated with, endorsed by, or sponsored by it.