Big Flat campground has 9 campsites, and access to many trails in the Trinity Alps Wilderness, including the Caribou Lakes. There is no potable water or garbage service provided, but there are vault toilets in the campground. There is also a small corral.
From I-5, take South Yreka exit. Go south on Hwy 3 for 63 miles to Coffee Creek Guard Station. Turn Right, and continue on Coffee Creek Rd for approx. 18 miles to campground.