Grass River Natural Area is a special place and one of Michigan’s premier nature preserves. Founded in 1969, GRNA was established by the community for the community. Located along Antrim County’s Chain of Lakes, Grass River Natural Area’s wetlands act as a filter for millions of gallons of water flowing into East Grand Traverse Bay and Lake Michigan. Seven miles of trails and boardwalk take visitors through cedar swamp, sedge meadow, and upland forest. The Grass River Center offers a comfortable and beautiful learning space for all visitors including school groups, day campers, and the general public. In fact we offer 100+ public programs annually! GRNA, Inc. is a 501(c)3 non-profit organization responsible for financing, preserving, and managing the 1492 acre Grass River Natural Area for public use by the people of Antrim County & its visitors.



To manage the Grass River Natural Area, conserve and protect its watershed and provide opportunities that increase knowledge, appreciation and community-wide stewardship of the natural environment.

Grass River Natural Area Inc.