Overview
Star Island is the most unusual destination in Chippewa National Forest: a 2,000-acre island in the middle of Cass Lake, reachable only by boat, that contains within it a second lake called Windigo Lake: creating the rare geographic phenomenon of a lake within a lake. The island is a National Natural Landmark, designated for its old-growth forest and unique hydrology.
The 3-mile loop trail circles the island's interior, passing through some of the oldest and largest trees in the Chippewa: sugar maple, basswood, and white pine with trunks 3 to 4 feet in diameter and estimated ages exceeding 200 years. The old-growth character here is distinctly different from the managed second-growth that covers most of the national forest.
The Route
Miles 0.0 to 1.0: Landing to Windigo Lake Spur
Land a boat on the island's south shore at the informal landing area. The trail begins as a clear path heading north into the forest. The old-growth character is immediately apparent: the canopy is high, the understory is open, and the trees are massive. A signed spur trail at mile 0.8 leads 0.2 miles to a viewpoint overlooking Windigo Lake. The lake is large and entirely enclosed by island: no roads or buildings visible on any shore. Return to the main trail.
Miles 1.0 to 2.0: North Shore Section
The trail reaches the north shore of Star Island at mile 1.4 with views across Cass Lake toward the forest and the Cass Lake township. Eagles and osprey are frequently seen hunting over the lake from perches in the island trees. The north shore section is the most exposed and the best for lake-watching.
Miles 2.0 to 3.0: South Shore Return
The return leg follows the east and south shores back to the landing, completing the loop. The south shore section passes a sandy beach point where swimmers wade on warm summer days.
When to Visit
June through September: Full open-water season. June mornings on the island are exceptionally quiet: birdsong and distant loon calls are the main sounds. July and August bring occasional motorboats visible on Cass Lake but rarely visitors to the island itself. September is ideal: warm enough to paddle comfortably, nearly no other visitors.
October: Possible in good weather but cold snaps can make the paddle across Cass Lake uncomfortable. The old-growth fall color is spectacular.
What to Bring
Carry all water from the mainland: lake water requires treatment. The boat crossing adds an extra dimension to preparation: life jackets for all, a bail bucket, a spare paddle. Sunscreen for the open-water crossing. The island trail itself requires only basic day-hiking gear for the loop.
Trailhead Access
No road access. Boat launches at Cass Lake and Federal Dam. The island is in the central Cass Lake basin, roughly 1.5 miles from the nearest launch. No fee for the trail or island (as of 2026). No facilities on the island. Dogs welcome on leash.
Nearby
The Norway Beach Loop and Shingobee Recreation Area Trail offer land-based alternatives in the same general area. If Star Island's boat-access requirement is not feasible, the Cut Foot Sioux Trail delivers old-growth red pine character accessible by road. Review Leave No Trace principles before camping on the island: this is a National Natural Landmark and deserves exceptionally careful stewardship.