Rogue–Umpqua Divide Wilderness, Protected wilderness area in southwestern Oregon, United States.

The Rogue–Umpqua Divide Wilderness is a 33,200-acre protected area in the Klamath Mountains of southwestern Oregon, established in 1984. It follows the ridge between the Rogue and Umpqua rivers, 10 miles west of Crater Lake National Park. Elevations run from 3,000 to 6,783 feet at Fish Mountain, with volcanic and sedimentary rock outcrops and dense conifer forests.

Congress designated this area as protected wilderness in 1984, securing its status within the federal conservation system. The remote location ensured the landscape remained largely undisturbed prior to official protection measures.

The name comes from the ridge that separates the Rogue and Umpqua river basins, crossed today by the 31.4-mile Rogue–Umpqua Divide National Recreation Trail. Hikers on the crest look east toward the Rogue drainage and west toward the Umpqua, and the Acker Divide and Cripple Camp trails pass through old-growth stands.

The area features around 100 miles of marked trails suitable for hikers of different abilities. Summer and early fall offer the best conditions for visiting, as snow melts from higher elevations and paths become more passable.

The main trail follows a ridge that divides two river systems, creating distinct ecosystems on either side of the crest. This geographical positioning allows visitors to experience two different natural zones within a single journey through the wilderness.