Culross Passage — Anchorage Guide
Overview
Culross Passage runs between Culross Island and the mainland — a protected inland waterway offering some of the most consistent anchorage conditions in Prince William Sound. The passage is a humpback whale feeding ground in summer, and it is not uncommon to anchor with whales actively feeding within sight of the vessel.
Approach
Multiple anchorage opportunities exist along the 12nm passage. The most popular is in the small bight on the eastern shore of Culross Island at approximate position 60°54’N, 148°11’W. Approach from the south through the main passage.
No hazards in the main passage. A shoal exists on the northern end near the exit to Port Wells — stay in mid-channel.
Anchoring
Soft mud throughout. Excellent holding. The central basin of the recommended anchorage holds 4–6 vessels comfortably at 25–45 ft. More isolated anchoring available further into the passage.
Wildlife
Summer humpback whale activity in Culross Passage can be extraordinary. The passage funnels krill and small fish, making it a reliable feeding area July through September. Orca pods follow the humpbacks. Dall’s porpoise are resident year-round.
Notes
- Light NE breeze can filter through in the morning — typically calm by mid-morning
- Dinghy exploration of the Culross Island shoreline is excellent
- Fresh water is available from several small streams
Add to Your Float Plan
Include Culross Passage as a waypoint or destination in your float plan for this trip.