| Ashuelot River | |
|---|---|
 | |
 | |
| Location | |
| Country | United States |
| State | New Hampshire |
| Counties | Sullivan, Cheshire |
| Physical characteristics | |
| Source | Butterfield Pond |
| • location | Washington |
| • coordinates | 43°13′35″N 72°07′09″W / 43.2265°N 72.1193°W |
| • elevation | 1,594 feet (486 m) |
| Mouth | Connecticut River |
• location | Hinsdale |
• coordinates | 42°46′20″N 72°29′15″W / 42.7723°N 72.4875°W |
• elevation | 187 feet (57 m) |
| Length | 64 mi (103 km) |
| Basin features | |
| Tributaries | |
| • left | The Branch South Branch Ashuelot River Mirey Brook |
The Ashuelot River is a tributary of the Connecticut River, approximately 64 miles (103 km) long, in southwestern New Hampshire in the United States. It drains a mountainous area of 425 square miles (1,101 km2), including much of the area known as the Monadnock Region. It is the longest tributary of the Connecticut River within New Hampshire.[1]