The Rogue–Umpqua Divide Wilderness is a wilderness area located in the Rogue River – Siskiyou and Umpqua National Forests in the Klamath Mountains of Oregon, United States. It was established by the United States Congress in 1984 and comprises 33,200 acres (13,400 ha).The Rogue–Umpqua Divide Wilderness is located ten miles west of Crater Lake National Park along the dividing ridge between the Rogue and Umpqua Rivers. Elevations range from 3,000 to 6,783 feet (914 to 2,070 m) at the summit of Fish Mountain. Volcanic activity created many unique volcanic and sedimentary rock outcrops.