Powder Mill Pond WMA contains old pasture woodlands of white pine, red maple and gray birch; old fields dominated by grasses, alder, aspen, cherry and birch; riverine habitat and its associated grass, sedge and red maple wetlands along the Contoocook River; and uplands of Appalachian oak/pine and hemlock/hardwood/pine forests. Approximately 29 acres of the tract lies within the flood zone.