Arch Rock is a dramatic and extremely rare geologic formation of brachiated limestone rising 146 feet above the water, about 15 stories, on Mackinac Island.
Breccia limestone is very rare as a material forming natural bridges in the Great Lakes region and the formation was the source of many Native American legends of both reverence and fear. The powers that followed in Michigan felt the rock was so unique that protecting it was one of the deciding factors in naming the Mackinac National Park in 1875, then becoming the Mackinac Island State Park in 1895. Left to evolve in its own way, Arch Rock still offers visitors a huge dose of beauty and awe.
Get there: Follow Arch Rock Road east past the fort.