Along the Lake Huron shoreline in the Thumb is the town of White Rock. It was named after, you probably guessed it, a white rock. They rock is about a half-mile offshore. Over the years it has broken up in the ice and is not as prominent as it once was but it is still visible. The rock was used as a boundary marker to define the territory ceded by Ottawa, Chippewa, Wyandot, and Potawatomi Native Americans with the Treaty of Detroit in 1807. A roadside park was built on M-25 and an overlook allows visitors to see the rock. The lake levels also have an impact on how much of the rock is visible. Next time you are taking a drive down M-25 and you see the roadside park be sure to stop and look at the rock that helped define Michigan.
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