Long Pond is a 211-acre (0.85 km²) cold water pond in Plymouth, Massachusetts, east of Myles Standish State Forest, Halfway Pond and Round Pond, west of Route 3 at Exit 3 and The Pinehills, northwest of Bloody Pond, and north of West Wind Shores. The pond has an average depth of 46 feet (14 m) and a maximum depth of 100 feet (30 m). It is fed by groundwater and an inlet from Little Long Pond, and drains into Halfway Pond.