| Mad River | |
|---|---|
The Mad River at Upper Mad River Road bridge betweenThornton andWaterville Valley | |
| Location | |
| Country | United States |
| State | New Hampshire |
| County | Grafton |
| Towns | Livermore,Waterville Valley,Thornton,Campton |
| Physical characteristics | |
| Source | Greeley Ponds |
| • location | White Mountain National Forest |
| • coordinates | 44°0′42″N71°30′25″W / 44.01167°N 71.50694°W /44.01167; -71.50694 |
| • elevation | 2,240 ft (680 m) |
| Mouth | Pemigewasset River |
• location | Campton |
• coordinates | 43°50′20″N71°39′6″W / 43.83889°N 71.65167°W /43.83889; -71.65167 |
• elevation | 543 ft (166 m) |
| Length | 17.9 mi (28.8 km) |
| Basin features | |
| Tributaries | |
| • left | Flume Brook, Cascade Brook, Snows Brook, Drakes Brook, Smarts Brook, Chickenboro Brook |
| • right | West Branch, Hardy Brook |
TheMad River is a 17.9-mile-long (28.8 km)[1]river in theWhite Mountains ofNew Hampshire in theUnited States. It is atributary of thePemigewasset River, part of theMerrimack Riverwatershed.
The Mad River begins at the Greeley Ponds in Mad River Notch, amountain pass betweenMount Osceola to the west andMount Kancamagus to the east, in the township ofLivermore. The river descends to the south, followed by the Greeley Pond Trail, to the town ofWaterville Valley, where theWest Branch enters.
After winding through theWaterville Valley Resort community, the Mad River proceeds southwest over continuous boulder-strewn rapids into a corner of the town ofThornton, eventually settling out in Campton Pond in the town ofCampton.[2] Passing over a small hydroelectric dam at Campton Upper Village, the river descends over some small waterfalls and enters thefloodplain of the Pemigewasset River, which it joins nearInterstate 93.
For most of the river's length below Waterville Valley, it is paralleled byNew Hampshire Route 49.