A gravel road curving into a high mountain valley at first light, the peaks catching the sun.

Forest Service cabin or lookout

Castle River Cabin

Forest Service cabin or lookout in Tongass National Forest, Petersburg County, Alaska. 46 feet. 16.4 miles from Kupreanof.

Managed by
Forest Service Tongass National Forest
Elevation
46 ft USGS elevation model, at the mapped point
Sites
1 1 cabin non-electric
Hookups
None listed
Reservations
Recreation.gov

Overview

Castle River 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 or Wrangell, and tides impact access. During low tides, a 2-mile hike is necessary to reach the cabin. Guests are responsible for their own travel arrangements and safety, and must bring several of their own amenities.

Recreation

The Castle River Trail leads a half-mile downstream to the Castle Flats Cabin, and a half-mile upstream to a rowboat and oars. Wildlife can be seen along the trail. Waterfowl, grouse, moose, deer and bear hunting is also 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 trout from April to May, trout from May to October, and coho salmon in mid-August through mid-September.

Boating is a popular way to explore the area, but a 16-foot tide is required to cross the tide flats in front of the cabin ( local tide tables ). Life jackets are not available; visitors must bring their own. Visitors may also choose to bring a small outboard motor for the rowboat.

Facilities

The modified A-frame cabin has an extended roof and an upright wall to form a bump-out. It has two double bunks and a sleeping loft to accommodate a total of seven people. The cabin is also equipped with a table, benches, a wood stove and an outhouse with a pit toilet. Firewood is generally available, but is not guaranteed. Firewood is for heating the cabin only, not for outdoor campfires. A broom, dust pan, axe and splitting maul are generally available, but may be missing or damaged. Drinking water is not available at the cabin. Water is available in the nearby river or streams, but it must be treated or boiled prior to consumption. It is recommended that visitors bring their own supply of water for drinking, cooking and cleaning. Visitors need to bring 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 inside a large tide flat on Kupreanof Island at the mouth of the Castle River on the west side of Duncan Canal. The surrounding terrain is predominantly flat-to-rolling old-growth forest and muskeg.

A variety of wildlife makes its home in the area, including moose, deer, black bears, waterfowl and grouse ( learn more about bear safety ).

The description, directions and fees are the Forest Service’s own words, from its record on Recreation.gov.

What people do here

  • camping
  • fishing
  • hiking
  • hunting
  • wildlife viewing

The land around Castle River Cabin

The ringed pin is this cabin or lookout; the others are its nearest neighbours. Switch on forest roads or BLM routes to see the way in.

Interactive map. Drag to pan, scroll or pinch to zoom, and select any point to see which agency manages the land. Arrow keys pan and the plus and minus keys zoom when the map has focus. A list of every state with its share of federal land is on the Explore page.

Map layers

Layers
Base map
Legend

Federal land, by managing agency

  • Bureau of Land Management (BLM)
  • US Forest Service (USFS)
  • National Park Service (NPS)
  • US Fish and Wildlife (USFW)
  • Bureau of Reclamation (USBR)
  • Department Of Defense (DOD)
  • Bureau of Indian Affairs (BIA)
  • Other Federal
  • State
  • Local
  • Alaska Native Lands (Patented or Interim Conveyed)
  • Alaska Native Allotment

Federal campgrounds, by agency

  • Forest Service
  • Bureau of Land Management
  • National Park Service
  • Army Corps of Engineers
  • Reclamation, Fish and Wildlife and others

State and local land (USGS PAD-US)

  • State land
  • County and city land
  • Regional agency or district
  • Land trust or conservancy

Gaps with no tint inside public land are private parcels, often old mining claims and homesteads. They are not open to the public.

Dashed clay lines on the base map are unpaved tracks from OpenStreetMap. They show what exists on the ground, not what is legal to drive.

Select any point to see who manages the land.

Boundaries are approximate and land status changes. This map is a planning aid, not a survey or a statement of access. Confirm routes, closures and camping rules with the managing office.

Source: Recreation Information Database (Recreation.gov), record updated February 25, 2026. Elevation from the USGS 3D Elevation Program. Seasons, fees, water and fire rules change; the managing office has the final word.