Castle River Cabin
Open year-round via Recreation.gov reservations. The facility is receiving minimal maintenance in 2026. Wood stove is present for heating; firewood is not guaranteed. No potable water is available. All garbage must be packed out.
Small Craft Advisory issued October 30 at 9:52PM AKDT until November 1 at 12:00PM AKST by NWS Juneau AK
* WHAT...Southeast winds 25 to 35 kt with gusts up to 45 kt and seas 8 to 13 ft expected. * WHERE...Sumner Strait. * WHEN...From 1 PM Saturday to noon AKDT Sunday. * IMPACTS...Conditions will be hazardous to small craft.
Small Craft Advisory issued October 30 at 3:29PM AKDT until October 31 at 5:00PM AKDT by NWS Juneau AK
Southeast Alaska Inside Waters from Dixon Entrance to Skagway Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent the average of the highest one-third of the combined windwave and swell height. .TONIGHT...Light winds becoming SE 15 kt. Seas building to 3 ft late. .SAT...SE wind 25 kt. Seas 5 ft, except 7 ft near ocean entrances. .SAT NIGHT...SE wind 25 kt. Seas 7 ft, except 11 ft near ocean entrances. Rain. .SUN...SE wind 30 kt. Gusts to 45 kt. Seas 7 ft, except 12 ft near ocean entrances. Showers. .SUN NIGHT...E wind 20 kt. Seas 4 ft, except 8 ft near ocean entrances. Showers. .MON...E wind 10 kt. Seas 3 ft. .TUE...E wind 25 kt. Seas 5 ft. .WED...E wind 20 kt. Seas 4 ft.
From Recreation.gov
Be advised this facility will receive minimal maintenance this year. If this facility has an oil stove please use clean #1 heating oil or kerosene to limit problems with operation. If this facility has a wood stove it is not guaranteed wood will be available. Please help us maintain this site for all to enjoy by packing out all garbage and leaving it cleaner than you found it. Report problems to the Petersburg Ranger District: 907-772-5869.
About
Castle River Cabin sits on the west side of Duncan Canal at the mouth of the Castle River on Kupreanof Island. The surrounding terrain is predominantly flat-to-rolling old-growth forest and muskeg, home to moose, deer, black bears, waterfowl, and grouse. The modified A-frame cabin features a wood stove for heating, two double bunks, a sleeping loft accommodating up to seven guests, a wooden table and benches, a counter, and a deck. Fishing is a major draw, with steelhead trout available April through May, trout from May to October, and coho salmon from mid-August through mid-September. A rowboat with oars is located half a mile upstream via the Castle River Trail. The trail also connects to nearby Castle Flats Cabin, half a mile downstream. Hunting for waterfowl, grouse, moose, deer, and bear is available in designated seasons. Visitors must be entirely self-sufficient. There is no potable water; all drinking water must be packed in or treated from streams. All trash and food must be packed out. Firewood may be available but is not guaranteed and is for heating the cabin only, not outdoor campfires. The pit toilet outhouse is the only restroom facility.
Directions
From Petersburg, 16 air miles by float plane or 30 water miles by boat. A 16-foot tide is required for direct boat or float plane access. At lower tides, up to a 2-mile hike across muddy tide flats is necessary. Alternatively, access Castle Flats Cabin (requires 15-foot tide for float plane or 13-foot tide for boat) and hike the easy 0.5-mile Castle River Trail to the cabin.
Location
Amenities
| Water | No |
| Fires Allowed | No |
| Toilets | Yes |
| Dump Station | No |
| Wifi | No |
| Pets Allowed | — |
| Showers | No |
| Electric Hookups | — |
| Water Hookups | — |
| Sewer Hookups | — |
| Camp Store | No |
| Price | $25 |
Vehicle
| Max RV Length | — |
| Max Trailer Length | — |
| Big Rig Friendly | No |
| Pull Through Sites | No |
Contact
| Phone | +1 (907) 772-3871 |
Cell Service
| AT&T | None |
| Verizon | None |
| T-Mobile | None |
Availability
Photos
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