| Slocum's River Reserve | |
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| Location | Massachusetts, United States |
| Coordinates | 41°33′07″N 71°00′33″W / 41.5519°N 71.0092°W |
| Established | 1999 |
| Operator | The Trustees of Reservations and The Dartmouth Natural Resources Trust |
| Website | The Trustees of Reservations The Dartmouth Natural Resources Trust  |
Slocum's River Reserve is a 47-acre (19 ha) open space preserve co-managed by the land conservation non-profit organizations The Trustees of Reservations and The Dartmouth Natural Resources Trust. The property includes 3,000 feet (910 m) of frontage along the tidal Slocum's River in Dartmouth, Massachusetts, 2 miles (3.2 km) of trails, woodland, agricultural fields, and pasture. The reserve is open to the public.