- Historic Sites
This 2,625 acre park, which also includes Camp Rotary, is located along the banks of the North Branch of the Clinton River in Ray Township, in north central Macomb County. Historic Grist Mill, with its grain grinding machinery and exhibits, offers a rare look at the past. Mills like it once dotted Michigan's countryside. Today, only a few remain. Built in 1847, the mill operated until 1967.