Alarm Rocks
Why dive here
With 58+ marine species recorded in the area - including blue sharks, blue whales, humpback whales, orcas and seals & sea lions - Alarm Rocks offers some of Alaska's richest wreck diving.
Brown Brothers, or "The Wrack" as most of us call it, isn't your typical Great Lakes wreck. Forget deep, dark, and frigid; this one sits comfortably shallow, making it a fantastic late-season dive when the lake finally warms up a bit. We’ve found the stern section offers the most intrigue, with its wooden beams now a lattice work for light to filter through. It’s a completely different vibe than the intact freighters. You’ll spend your time here exploring the broken hull, feeling the surge when the lake kicks up, and watching how the local fish use the wreckage as shelter. We've seen some surprisingly large Walleye lurking in the shadows, and the Shorthead Redhorse seem to love sifting through the silt near the collapsed bow. It's an easy dive, perfect for working on your buoyancy or just enjoying a relaxed afternoon underwater, feeling the history of these old lake boats. Our pick for an unhurried exploration.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Alarm Rocks Wreck History
Vessel Type
cargo ship
Cause
unknown
The dive site known as 'Brown Brothers' in the Ontario Great Lakes offers a fascinating glimpse into the region's rich maritime past. While records are scarce, the name suggests a historic Great Lakes freighter or schooner. The cold, fresh water of the Great Lakes provides incredible preservation conditions, meaning even centuries-old wooden wrecks can remain astonishingly intact. Divers exploring this site can expect to find a vessel frozen in time, with features like the hull, decking, and perhaps even masts and rigging visible. These wrecks are often protected heritage sites, offering a unique opportunity to dive through a piece of North American history, but requiring careful, responsible diving practices to preserve them for future generations.
Reviews for Alarm Rocks
Conditions
Ocean conditions, forecast and tides for Alarm Rocks
Alarm Rocks Ocean Conditions
Monthly averages for Alarm Rocks, sourced from NOAA buoy data - nearest station: Open-Meteo grid (55.23, -4) (0km away)
August Averages
Air Temperature
12.7°C
55°F
Wind Speed
5.31 m/s
10.3 knots
Atmospheric Pressure
1012.9 hPa
Based on 5 years of monitoring data · Data sources: NOAA NDBC
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