The Massasauga Provincial Park is a provincial park in Parry Sound District, Ontario, Canada, stretching from the town of Parry Sound south to the Moon River. The park has an area of 131.05 km2 (50.60 sq mi). An interpretive trail is located on Wreck Island. A multi-day backpacking trail in the northern part of the park, the Nipissing-North Arm Orienteering Trail, is used for orienteering. This wilderness trail is uncleared and only minimally marked. "Massasauga" means "mouth of the river" in Ojibwe. The name also refers to the massasauga rattlesnake, which is found in the area.