Big Trinity Lake Campground offers 17 first-come, first-served tent sites at 7,900 feet elevation within the Trinity Recreation Area, featuring direct lake access for non-motorized boating and fishing.

The campground provides potable water, vault toilets, and picnic tables, with a short 1. 2-mile trail around the lake and access to the 4-mile Rainbow Basin Trail System for hiking.

Note that the site is accessible by passenger car but has limited seasonal availability (mid-July through October due to late snowmelt), and trailers are not recommended on the dirt Forest Service roads leading to the campground.