Weekends are gone and midweek mostly isn’t. Across the 115 California state parks and beaches we track on ReserveCalifornia, 83% of Friday and Saturday nights have been sold out since our record began on August 17, 2026. Midweek nights: 41%. On the recreation.gov side (national parks and national forests in California) it’s 66% of weekend nights sold out versus 45% midweek.

So “how far in advance should I book” has two answers. For a Friday or Saturday night at a coastal park or in Yosemite Valley, book the morning the date opens or plan on catching a cancellation. For a Tuesday night almost anywhere, you can usually book the week of.

## The campgrounds with nothing at all

We scored every campground we track for the three weeks from September 10 to September 30, 2026. A score of 100 means nothing was bookable on any of the 21 nights. Nine campgrounds hit 100:

– Big Basin Redwoods SP (93 sites)
– Emma Wood SB (79 sites)
– Westport-Union Landing SB (78 sites)
– Plaskett Creek, Big Sur (43 sites)
– El Capitan SB (22 sites)
– Mount Tamalpais SP (9 sites)
– Tolowa Dunes SP
– Manresa SB
– Andrew Molera SP

Big Basin is the one that surprises people. Ninety-three sites and not one open night in late September. It’s not a beach and it’s not Yosemite. It’s just close to the Bay Area.

Yosemite Valley sits one point lower. Upper Pines (235 sites), North Pines (81) and Lower Pines (74) all scored 98. Half Moon Bay SB scored 95, Crystal Cove Moro 93, and Emerald Bay at Tahoe 89. Those aren’t sold out every single night, but close enough that you shouldn’t plan a trip around finding a gap.

## The coast, sorted

Of the 36 coastal campgrounds we rate, 10 had nothing bookable on any night in the window. Four had room on nearly every night. The other 22 fell somewhere between.

The Extreme tier (score 85 or higher) this autumn: Andrew Molera, Bolsa Chica, Crystal Cove Moro, El Capitan, Emma Wood, Gold Bluffs Beach, Half Moon Bay, Manresa, Westport-Union Landing and Tolowa Dunes.

The Low tier (room on nearly every night): Hearst San Simeon, Salt Point, Silver Strand and Sue-meg.

In between, the High group includes Doheny, Leo Carrillo, Point Mugu, Refugio, San Clemente, San Elijo, South Carlsbad, Morro Bay, New Brighton and Sonoma Coast. The Moderate group includes Carpinteria, Gaviota, Pismo, Oceano Dunes, San Onofre, Sunset, MacKerricher and Van Damme. The live version of this ranking, updated daily, is at [hardest campgrounds to book](https://campsitescan.com/hardest-campgrounds-to-book), and the beach pages are collected at [California beach camping](https://campsitescan.com/california-beach-camping).

One thing the numbers make clear: “beach camping” gets searched in California about as often as “california camping” itself (Google Trends index 52 versus 54 over five years). The coast is the main event, which is why it’s the hardest part.

## The famous 27

We also looked at the 27 best-known campgrounds in the state as a group. Four had nothing bookable on any night in the next three weeks. Seven still had room. The other 16 had a night here and there, mostly midweek.

That’s a more hopeful picture than the beach list. Fame and sellout aren’t the same thing. Tuolumne Meadows in Yosemite has 277 sites and rated only Moderate in summer (it climbs to High in autumn as the season shortens). D.L. Bliss at Tahoe rated Moderate too.

The desert is the other exception. Jumbo Rocks (119 sites), Indian Cove (97) and Black Rock (94) in Joshua Tree, and Anza-Borrego Desert SP (126), all rated Low in September. Wide open. Nobody wants the desert in the heat. In the cool months the same campgrounds book months ahead, so the answer to “how far ahead” for the desert depends entirely on the calendar.

## When everyone else starts looking

Google Trends for “california camping” peaks in the last week of June every year. Interest is lowest in November and December (index 30), then jumps about 50% in the week after Christmas. That post-Christmas week is when the competition for next summer starts. On ReserveCalifornia, state park dates open six months ahead, rolling daily at 8am Pacific. Yosemite Valley campgrounds on recreation.gov open five months ahead in one-month blocks on the 15th of each month at 7am Pacific [VERIFY: 2027 Yosemite release schedule]. Count back from your dates and be at your keyboard that morning.

## If you missed the window

Sites do come back. Of the cancellations we caught over the last 28 days, three quarters reappeared within a week of the arrival date. Booking six months out is the sure route. Watching the final week is the other one, and it works more often than people expect. There’s a full breakdown in [when cancelled campsites reappear](https://campsitescan.com/articles/when-cancelled-campsites-reappear).

## How we measured this

We check the booking systems behind 115 ReserveCalifornia parks (304 campground sections) and 500 recreation.gov campgrounds in California several times a day. For each campground and each night we record whether at least one site is bookable. The sellout score is the share of Friday and Saturday nights with nothing bookable, weighted 65%, plus the share of midweek nights with nothing, weighted 35%. Since our record began on August 17, 2026 (25 days), we’ve rated 43 ReserveCalifornia parks and 14 recreation.gov campgrounds daily. More detail in [how we measure](https://campsitescan.com/articles/how-we-measure).

Caveats, plainly. This is a short record: 25 days of availability and 28 days of alerts. The campgrounds are the ones our users asked us to watch, plus well-known parks we added ourselves, so it’s not a random sample of the state. One open site counts as open, so a night that shows as “not sold out” may have exactly one site left, possibly a walk-in tent spot. And September is shoulder season. A July run of these numbers would look worse for the coast and better for the desert.

If you’re a reporter or researcher and want the underlying table, email us and we’ll share it with the dates and sources attached.

Set a free alert on the campground you actually want at [campsitescan.com](https://campsitescan.com/) and we email you the moment a site comes back.