Trinity Alps Wilderness covers 22,863 acres, Snow Mountain Wilderness covers 23,706 acres, Yolla Bolly-Middle Eel Wilderness covers 27,036 acres and Siskiyou Wilderness covers 30,122 acres.
525,627 acres (212,714 ha) 
37,679 acres (152.48 km) 
180,877 acres (731.98 km) 
