Great Brook (Cold River tributary)
|Towns||Acworth, Charlestown, Langdon|
|• elevation||1,535 ft (468 m)|
|305 ft (93 m)|
|Length||10.0 mi (16.1 km)|
|• left||Putnam Brook|
|• right||Jed Brook, Fifield Brook, Little Brook, Brush Meadow Brook, Jewett Brook|
Part of the Connecticut River watershed, Great Brook begins in the highlands in the town of Acworth, New Hampshire, and flows southwest through the center of the town of Langdon, joining the Cold River 2 miles (3 km) upstream from the Connecticut River.