Sanilac Petroglyphs Historic State Park

8251 Germania Road,
Cass City, MI 48726
Within the 240-acre parcel historic site are the Sanilac Petroglyphs. Michigan's only known rock carvings attributed to Native American workmanship in the Lower Peninsula of Michigan. The site is open Wednesday through Sunday, 10 a.m. to 5 p.m., through September 3. The site will be open Monday, September 4 (Labor Day), from 10 a.m. to 5 p.m. Send any correspondence to Sleeper State Park, 6573 State Park Rd, Caseville MI 48725.
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