The Owyhee River Wilderness is located on the high basalt plateaus of Owyhee County in southwestern Idaho in the western United States. The wilderness area is named after and protects the upper Owyhee River, its tributaries, and the surrounding desert canyon landscape. Whitewater rafting is a popular recreational activity in this wilderness area. Managed by the Bureau of Land Management, it is the second-largest U.S. Wilderness Area that is not located within a National Forest, National Park, or National Wildlife Refuge. The BLM's Black Rock Desert Wilderness, located within Black Rock Desert – High Rock Canyon Emigrant Trails National Conservation Area, is larger. About 67.3 miles (108.3 km) of the Owyhee River is classified as a wild river.