Sanilac Petroglyphs Historic State Park Maps

Sanilac Petroglyphs Historic State Park Description

Rock carvings, known as petroglyphs, etched into a sandstone outcrop are a mystery. Yet they give us a glimpse into the lives of early Native American artists. The Sanilac Petroglyphs are Michigan's largest known group of ancient rock carvings. The park covers 240 acres along the Cass River near Cass City in Michigan's Thumb region and is also home to a one-mile hiking trail that crosses the Little Cass River in two places. Stone tools and pottery found on the petroglyphs site show tribal groups have occupied the area periodically throughout the last 8,000 years. The petroglyphs were likely c