200 campgrounds with group sites in California
Most are run by the Forest Service. The two with the most are San Bernardino National Forest and Eldorado National Forest. Sizes are lopsided, from 1 site at the small end to 309 at the large.
A campground is listed when at least one of its site types in the Recreation.gov records is a group site.
Reservable Partly reservable First-come, first-served
All 200
Also in California
All 963 campgrounds in California · Electric hookups · First-come, first-served · Reservable · Free · Big rigs · Tent only · Pets allowed · Accessible sites · Dark sky · Group sites in every state