My main activity on Mackinac island was to rent a bike and ride it around the island, along the shore. It’s an easy 8 mile ride, so I got a basic one-speed. It was fun, and I took an hour and a half to do it. It took a little getting used to coaster brakes, and the fact that I have to swing my leg over instead I’d stepping through on my usual ride.
I also visited Fort Mackinac, which I’d skipped on my previous two visits to the island. I obviously haven’t done everything there is to do on Mackinac, but I’ve hit all the major attractions.
Always have wanted to go back since I went as a wee one. The bicycle sounds fun.