Dukes Research Natural Area
Located within the Upper Peninsula Experimental Forest of the Hiawatha National Forest, the Dukes Research Natural Area is an undisturbed white cedar and mixed conifer swamp containing old-growth hardwood stands.
Year designated: 1974
Please remember, National Natural Landmarks (NNLs) are not national parks. NNLs are owned by a variety of public and private entities and allowing visitation is at their discretion. Many NNL sites maintain public websites where additional information may be found.