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Camping · Alaska

CASTLE FLATS CABIN

Campground · Fee not listed

Fee not listed

Fast facts

Cost
Not listed. Check locally.
Type
Campground
Phone
907-772-3871
Coordinates
56.6461, -133.2500
Last verified
September 19, 2026
56.6461° N · 133.2500° W
Last verifiedSeptember 19, 2026

About this place

Overview Castle Flats Cabin is located on Kupreanof Island on the coastal waters of southeastern Alaska. It offers access to a variety of outdoor recreational opportunities, as well as a secluded place to enjoy its beautiful surroundings. The cabin is accessible only by boat or float plane from Petersburg, and tides impact access. During low tides, a 2-mile hike is necessary to reach the cabin. Visitors are responsible for their own travel arrangements and safety, and must bring several of their own amenities. Recreation The Castle River Trail is an easy, 1-mile trail that leads first to the Castle River Cabin and continues upstream another half-mile through forest and muskeg. Wildlife can be seen along the trail. Waterfowl, grouse, moose, deer and bear hunting is available in designated seasons as per state or federal hunting regulations; click here for more information from the Alaska Department of Fish and Game. Visitors also enjoy fishing for steelhead from April to May, trout from May to October, and coho salmon in mid-August through mid-September. A small rowboat and oars are provided at the cabin. Life jackets are not provided and visitors must bring their own. Visitors may also choose to bring a small, outboard motor. Crossing the tide flats by boat requires at least a 13-foot tide (local tide tables). Facilities The hunter-style cabin has four wooden bunks and can accommodate up to five people. It is equipped with a table and benches, wood stove and oil heater. The cabin has a covered porch and an outhouse with a pit toilet. Firewood is generally provided, but is not guaranteed. A broom, dust pan, axe and splitting maul are generally available, but may be missing or damaged. Drinking water is not available. The nearest water source is a small stream west of the cabin, but water must be treated or boiled prior to consumption. Visitors may want to bring their own drinking water to avoid the hassle. Heating oil is not provided. Visitors need to bring No. 1 heating oil for the clean-burning oil heater, in addition to sleeping bags and pads, a cook stove and cooking gear, towels, food, clothing and garbage bags, among other necessities. All trash and food must be packed out, and visitors are expected to clean the cabin before leaving. Click here for more cabin details and maps. Natural Features The cabin is located on southeastern Kupreanof Island, on the edge of the Castle River tide flat in Duncan Canal. The surrounding terrain is predominantly flat, old-growth forest and muskeg. A variety of wildlife makes its home in the area, including moose, deer, black bears, waterfowl and grouse. During spring migration, the flats are host to many bird species.

From the managing agency.

Is CASTLE FLATS CABIN free?

We do not have a fee on record for CASTLE FLATS CABIN. Confirm the cost locally before you go.

How do I get to CASTLE FLATS CABIN?

CASTLE FLATS CABIN is at 56.6461, -133.2500. We do not hold written directions for this one, so navigate to the coordinates.

Nearby

No other services within 50 mi on the record.

SourceSource data is agency published. Last synced September 19, 2026. Community reports and photos are submitted by travelers and are not verified by the agency.

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Disclaimer TerrainKit is an independent product with no affiliation with, sponsorship from or endorsement by the U.S. Forest Service, the Bureau of Land Management, the National Park Service or any other public agency. Site and access information is compiled from publicly available sources and can go out of date without notice. Confirm current rules, closures, fire restrictions and stay limits with the managing ranger district or field office before you camp.
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47.5053° N · 111.3008° W
CASTLE FLATS CABIN, Camping in Alaska - TerrainKit