| South Triangle Pond | |
|---|---|
| Location | Plymouth, Massachusetts |
| Basin countries | United States |
| Surface area | 15 acres (6.1 ha) |
South Triangle Pond is a 15-acre (61,000 m2) pond in Plymouth, Massachusetts within the Eel River watershed. The pond is located north of South Pond village in the Plymouth Town Forest, east of Great South Pond and south of Plymouth's main Post Office and The Shops at 5. The water quality is impaired due to non-native aquatic plants and nuisance exotic species.