Kosciusko Island: Remote Wilderness in Alaska’s Tongass National Forest

Why Visit Kosciusko Island

Kosciusko Island lies in the Alexander Archipelago of Southeast Alaska, entirely within the Tongass National Forest. Its 180 square miles of roadless terrain feature towering Sitka spruce and western hemlock, sheltered bays, and rugged coastline that attract visitors seeking true solitude. The island remains one of the least developed parts of the national forest, preserving a sense of untouched wilderness rare even in Alaska.

Getting There

Most travelers reach Kosciusko Island from the nearby communities of Craig or Klawock on Prince of Wales Island. Floatplane flights from Ketchikan or Juneau provide scenic aerial views and direct beach landings. Boat access via the Inter-Island Ferry or private charter allows exploration of the surrounding waters at a slower pace. Once on the island, movement is by foot, kayak, or small skiff, as no roads or developed trails exist beyond a few historic routes.

Things to Do

Hiking and Exploration

Self-guided hikes through ancient forest lead to alpine meadows and coastal viewpoints. Visitors often follow game trails or beach routes that reveal hidden coves and salmon streams. Carry a map, compass, and tide tables, since weather and tides change rapidly.

Fishing and Kayaking

The island’s protected inlets and outer coastlines offer excellent opportunities for salmon and halibut fishing from shore or kayak. Kayakers can paddle between sheltered bays, watching for sea otters and harbor seals. Always file a float plan and monitor marine weather forecasts.

Wildlife Viewing

Black bears frequent the streams during salmon runs, while bald eagles nest in the tall trees. Whale sightings are common in the channels between Kosciusko and Prince of Wales islands. Maintain safe distances and store food properly to avoid encounters.

Best Time to Visit

Late spring through early fall brings milder temperatures and longer daylight ideal for outdoor activities. July and August coincide with peak salmon runs and the most reliable weather windows, though rain remains possible any day. Winter visits are discouraged due to short days, heavy snow, and limited transportation options.

Nearby Attractions

Prince of Wales Island, just a short boat ride away, provides the nearest services, including small airports, lodges, and the extensive road system that connects communities such as Thorne Bay and Hydaburg. Further afield, the wild coastline of the outer islands and the dramatic fjords near Misty Fjords National Monument offer additional paddling and wildlife destinations for those extending their Southeast Alaska itinerary.