Coldwater Lake State Park is an undeveloped public recreation area occupying 400 acre on the south shore of Coldwater Lake, 10 mi south of the city of Coldwater in Branch County, Michigan. Money from the Natural Resources Trust Funds was used to create the state park in 1988. Two small, unpaved parking areas offer walk-in access for hunters and fishermen. A general management plan for the park was adopted by the Michigan State Parks Advisory Committee in 2015.