Otter River State Forest
| Otter River State Forest | |
|---|---|
| Location | Templeton, Winchendon and Royalston, Massachusetts, United States |
| Coordinates | 42°38′39″N 72°05′16″W / 42.6442946°N 72.087728°W |
| Area | 1,022 acres (414 ha) |
| Elevation | 820 ft (250 m) |
| Established | 1915 |
| Administrator | Massachusetts Department of Conservation and Recreation |
| Website | Official website |
Otter River State Forest is a publicly owned forest and recreational preserve located in the towns of Templeton, Winchendon, and Royalston in Massachusetts managed by the Massachusetts Department of Conservation and Recreation. The state forest encompasses the land surrounding the junction of the Otter and Millers rivers. Habitats include freshwater marsh, northern hardwood stands, and pine groves planted by the Civilian Conservation Corps to reforest former farmlands.