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The Lake Huron side is very shallow with a gradual slope. There are not a lot of shore diving sites that I can think of, except the St Clair River at the Blue Water Bridge. Sturgeon spawn there in June, but! it’s a high current dive +4kts with lots of boats, so it’s better to do this one with a group. Dean’s Sport and Dive in Kitchener does St Clair River dives.
Very cool. I'm looking forward to Colboy's Bay. It looks like the Wiarton Marina is just south of the Wiarton Fish Hatchery/Water Filtration plant. Do you have a favorite entry point that you could recommend?
I had my boat so we anchored about 200 yards off Bluewater Park and dove there. Your best bet is the beach and the north side of the marina wall. There was lots of cool junk on the bottom where we made our scooter run. If I go back, Gunderson Shoal will be on the list too. @shoredivr for the underwater forest and the fake cemetery thing.
The easiest way in is the little pebble “beach” beside the boat ramp (1 on the map), though you can drive past the water treatment plant to a more rocky entrance (2 on the map). The old fish hatchery was I think at the little inlet (3 on the map).
