South Branch Souhegan River
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Location
Country	United States
States	Massachusetts, New Hampshire
Counties	Worcester, MA, Middlesex, MA, Hillsborough, NH
Towns	Ashburnham, MA, Ashby, MA, New Ipswich, NH
Physical characteristics

Source	Stodge Meadow Pond
• location	Ashburnham, MA
• coordinates	42°40′11″N 71°52′53″W / 42.66972°N 71.88139°W / 42.66972; -71.88139
• elevation	1,129 ft (344 m)

Mouth	Souhegan River
• location	New Ipswich, NH
• coordinates	42°43′52″N 71°50′47″W / 42.73111°N 71.84639°W / 42.73111; -71.84639
• elevation	927 ft (283 m)
Length	5.8 mi (9.3 km)

The South Branch of the Souhegan River is a 5.8-mile-long (9.3 km)^[1] river located in northern Massachusetts and southern New Hampshire in the United States. It is a tributary of the Souhegan River, which flows to the Merrimack River and ultimately to the Gulf of Maine.

The South Branch begins near Mount Watatic at the outlet of Stodge Meadow Pond in the town of Ashburnham, Massachusetts, and flows north through a chain of small lakes (Marble Pond, Ward Pond, and Watatic Pond) before turning northeast into the town of Ashby, Massachusetts. North of Ashby, the river enters New Ipswich, New Hampshire, passes through a small flood control reservoir, and joins the West Branch to form the Souhegan River, just north of the intersection known as "Gibson Four Corners".

References

^ New Hampshire GRANIT state geographic information system

Merrimack River watershed

Towns

Landmarks

Rivers of Massachusetts by drainage system

Atlantic Ocean

Buzzards Bay	Acushnet River Agawam River Back River Copicut River Crooked River Mattapoisett River Nasketucket River Paskamanset River Pocasset River Sippican River Slocums River Wankinco River Westport River Weweantic River
Nantucket Sound	Bass River Bumps River Childs River Coonamesset River Mashpee River Mitchell River Oyster Pond River Popponesset Creek Quashnet River Santuit River
Others	Tiasquam River

Gulf of Maine

Cape Cod Bay	Bluefish River Eel River Herring River Jones River Little Pamet River Pamet River Town Brook
Massachusetts Bay	Aberjona River Alewife Brook Canton River Charles River Chelsea Creek Cochato River Fore River Fresh River Indian Head River Malden River Millers River Monatiquot River Muddy River Mystic River Neponset River North River Saugus River Stony Brook (Boston) Stony Brook (Waltham) Stop River Weir River Weymouth Back River
Merrimack River Watershed	Artichoke River Assabet River Back River Beaver Brook Cochichewick River Concord River Little River Merrimack River Nashua River Nissitissit River North Nashua River Phillips Brook Powwow River Quinapoxet River Salmon Brook Shawsheen River Souhegan River South Branch Souhegan River South Nashua River Spicket River Squannacook River Stillwater River Sudbury River Trout Brook Vine Brook Whitman River
Others	Annisquam River Blackwater River Eagle Hill River Egypt River Ipswich River Jericho Creek Roger Island River Rowley River Skug River

Long Island Sound

Connecticut River Watershed	Burnshirt River Chapel Brook Chicopee River Connecticut River Cranberry River Deerfield River East Brookfield River Farmington River Fall River Five Mile River Green River Hubbard River Manhan River Mill River (Northampton) Mill River (Springfield) Millers River Mirey Brook North Branch Millers River North Branch Westfield River North River Otter River Quaboag River Scantic River Seven Mile River Tarbell Brook Ware River Westfield River
Housatonic River Watershed	Housatonic River Konkapot River Schenob Brook Umpachene River
Thames River Watershed	French River Quinebaug River

Narragansett Bay

Mount Hope Bay (Taunton River Watershed)	Assonet River Canoe River Cedar Swamp River Cocasset River Cotley River Forge River Hockomock River Matfield River Mill River Nemasket River Poor Meadow Brook Quequechan River Rumford River Salisbury Plain River Satucket River Segreganset River Shumatuscacant River Snake River Taunton River Three Mile River Town River Wading River Winnetuxet River
Providence River Watershed	Abbott Run Blackstone River Bungay River Chockalog River Mill River Mumford River Peters River Quinsigamond River Sevenmile River Tannery River Ten Mile River West River Wilde River
Others	Barrington River Cole River Coles Brook Kickamuit River Lees River Palmer River Runnins River

Upper New York Bay

Hudson River Watershed	Hoosic River Kinderhook Creek

Rivers of New Hampshire by drainage system

Gulf of Maine

Atlantic coastal tributaries	Blackwater River Browns River Drakes River Hampton River Hampton Falls River Little River Old River Taylor River
Merrimack River watershed	Baboosic Brook Back River Baker River Bear Brook Beards Brook Beaver Brook Beebe River Big River Black Brook Blackwater River Cockermouth River Cohas Brook Contoocook River East Branch Baker River East Branch Pemigewasset River Fowler River Frazier Brook Gridley River Gunstock River Lane River Little River (Big River) Little River (Merrimack River) Little Massabesic Brook-Sucker Brook Little Suncook River Lost River Mad River Melvin River Merrimack River Merrymeeting River Middle Branch Piscataquog River Moosilauke Brook Nashua River Newfound River Nissitissit River North Branch Contoocook River North Fork East Branch Pemigewasset River Nubanusit Brook Pemigewasset River Pennichuck Brook Piscataquog River Powwow River Purgatory Brook Red Hill River Salmon Brook Shedd Brook Smith River Soucook River Souhegan River South Branch Baker River South Branch Piscataquog River South Branch Souhegan River Spicket River Squam River Stony Brook Suncook River Tioga River Turkey River Warner River West Branch Mad River West Branch Souhegan River West Branch Warner River Winnipesaukee River
Merrymeeting Bay (Androscoggin River watershed)	Androscoggin River Chickwolnepy Stream Clear Stream Dead River Dead Diamond River East Branch Dead Diamond River Little Dead Diamond River Little Magalloway River Magalloway River Middle Branch Dead Diamond River Middle Branch Little Magalloway River Mollidgewock Brook Moose Brook Moose River Peabody River Rattle River South Branch Little Dead Diamond River Swift Diamond River West Branch Dead Diamond River West Branch Little Dead Diamond River West Branch Little Magalloway River West Branch Magalloway River West Branch Peabody River Wild River
Piscataqua River watershed	Bean River Bellamy River Berrys River Branch River Bunker Creek Cochecho River Ela River Exeter River Fresh River Isinglass River Jones Brook Lamprey River Little River (Brentwood) Little River (Exeter) Little River (Lamprey River) Mad River North River North Branch River Oyster River Pawtuckaway River Piscassic River Piscataqua River Rattlesnake River Salmon Falls River Squamscott River Winnicut River
Saco Bay (Saco River watershed)	Bearcamp River Beech River Chocorua River Cold River (Bearcamp River) Cold River Cutler River Dan Hole River Deer River Dry River East Branch Saco River East Branch Whiteface River East Fork East Branch Saco River Ellis River Little Cold River Lovell River Mad River Middle Branch Mad River Mill Brook New River Ossipee River Pequawket Brook Pine River Rocky Branch Saco River Sawyer River Shepards River South River South Branch Mad River Swift River (Bearcamp River) Swift River (Saco River) West Branch Whiteface River Wildcat Brook Wonalancet River

Long Island Sound

Connecticut River watershed

See also

References