The Kuiu Wilderness and Tebenkof Bay Wilderness are federally designated wilderness areas within the Tongass National Forest, located on Kuiu Island, Petersburg Census Area, Alaska. The 60,581-acre (24,516 ha) Kuiu and 66,812-acre (27,038 ha) Tebenkof Bay wildernesses are managed by the United States Forest Service as a single area—creating a 200-square-mile (520 km2) wilderness preserve covering the heart of the island. Together, the two areas protect old-growth temperate rainforests rising from coastal estuaries to subalpine meadows more than 2,000 feet (610 m) in elevation, with a high point atop the 3,355-foot (1,023 m) Kuiu Mountain.