Dukes Research Natural Area State Park

(Michigan)

The Dukes Research Natural Area is a 233-acre (0.94 km2) tract of northern hardwood forest located within the 5,000-acre (20 km2) Upper Peninsula Experimental Forest, a unit of the Hiawatha National Forest in the Upper Peninsula of the U.S. state of Michigan. The Dukes Research Natural Area was listed in 1974 as a National Natural Landmark by the U.S. Department of the Interior. (Ref: https://en.wikipedia.org/wiki/Dukes_Research_Natural_Area)