Boulder Basin is a national park campground at San Bernardino National Forest in Riverside County, California. Reservations are managed through Recreation.gov. Campsite Tonight watches San Bernardino National Forest around the clock and automatically adds an open site to your Recreation.gov cart the moment a cancellation appears — so you just check out.
Boulder Basin is in very high demand — sites here routinely sell out well in advance. Cancellations are often the best way in, which is exactly what Campsite Tonight watches for.
The campground accommodates RVs and trailers up to 20 ft. Campers rate it 4.3/5 across 26 reviews.
Other campgrounds at San Bernardino National Forest include Black Mountain (san Bernardino), Dark Canyon Campground , Marion Mountain and Fern Basin.
Total reservations in May — 2023: 24 · 2024: 56 · 2025: 44
Address
Idyllwild, California
Coordinates
33.8264, -116.7539
Very high demand - sites typically fill up immediately when the booking window opens. Plan to book the moment reservations open.
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San Bernardino National Forest
San Bernardino National Forest
San Bernardino National Forest
San Bernardino National Forest
Mt. San Jacinto SP
Mt. San Jacinto SP
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