Kuiu Wilderness and Tebenkof Bay Wilderness, Protected wilderness areas on Kuiu Island, Alaska

Kuiu Wilderness and Tebenkof Bay Wilderness are two federally designated wilderness areas on Kuiu Island in the Petersburg Census Area of southeastern Alaska, managed by the U.S. Forest Service as a single 200-square-mile (520 km2) preserve within Tongass National Forest. The Kuiu covers 60,581 acres (24,516 ha) and the Tebenkof Bay 66,812 acres (27,038 ha), protecting old-growth temperate rainforest of Sitka spruce and western hemlock that rises from coastal estuaries to subalpine meadows above 2,000 feet, with the 3,355-foot (1,023 m) Kuiu Mountain as the high point.

Tebenkof Bay takes its name from Captain Tebenkov, a Russian colonial administrator in Alaska during the mid-1800s. The wilderness areas were formally protected much later to preserve these ecosystems.

The Tlingit communities of Kake and Klawock have maintained a long relationship with these lands through hunting, fishing, and gathering. Their presence shaped how the forest and coast are used and remembered today.

Access is only by boat or floatplane, as no roads reach these protected areas in the Alexander Archipelago. Visitors should prepare for remote conditions and check local water and weather before traveling.

The only camping shelter in either wilderness stands near the shoreline of the Bay of Pillars and is available first-come, first-served. Built in 1997, it was designed to recall the shelters raised in Southeast Alaska by Civilian Conservation Corps crews in the 1930s.