This allows visitors a good window of opportunity to observe birds and wildlife before trees burst forth in a leafy cover. In addition to the great variety of birds, the preserve provides habitat for 49 species of mammals and 400 plant species. The year's procession of stunning wildflowers begins in early spring. Look for pink and yellow lady's-slippers, marsh marigolds, trailing arbutus, buttercups and violets. Watch for a profusion of wetland wildflowers to burst forth beginning in early June.
Easy accessibility is one of the more significant aspects of Grass River Natural Area.
Its bounty of natural resources is conveniently viewed from the excellent trail system. A boardwalk trail extending for more than one mile is handicapped-accessible. While providing access to those with limiting physical conditions, the boardwalk allows even the youngest member of the family the chance to enjoy an amble in the natural world from their stroller or wagon. This boardwalk winds through swamp habitats into the uplands region of the preserve. Another loop of the trail winds along Finch Creek.