The second largest wilderness area in California, the Trinity Alps Wilderness nearly doubled in size by the 1984 California Wilderness Act.  In that same year, it was added to the National Wilderness Preservation System.  It currently has over 600 miles of trails and embraces over 500,000 acres of land.

Chiseled granite peaks and alpine lakes dot the Trinity Alps Wilderness, with elevations from 2,000 feet in creek drainages to 9,000 feet at summits. This wilderness offers many different trails ranging from 1.5 miles to 15 miles at varying levels of difficulty.