Within the 240-acre parcel historic site are the Sanilac Petroglyphs, Michigan's only known prehistoric rock carvings attributed to Native American workmanship in the Lower Peninsula of Michigan.
The Petroglyphs will be open for viewing Wednesday through Sunday, 10 a.m. to 5 p.m., Memorial Day through Labor Day (please call to confirm hours and dates). The rest of the park contains a one-mile hiking trail that crosses the Little Cass River in two places. Dogs are not permitted in buildings or in swimming areas.
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