The Connecticut River is the longest river in the New England region of the United States, flowing roughly southward for 406 miles (653 km) through four states. It rises 300 yards south of the U.S. border with Quebec, Canada, and discharges at Long Island Sound. Its watershed encompasses 11,260 square miles (29,200 km2), covering parts of five U.S. states and one Canadian province, via 148 tributaries, 38 of which are major rivers. It produces 70% of Long Island Sound's fresh water, discharging at 18,400 cubic feet (520 m3) per second.
The Housatonic River is a river, approximately 149 miles (240 km) long, in western Massachusetts and western Connecticut in the United States. It flows south to southeast, and drains about 1,950 square miles (5,100 km2) of southwestern Connecticut into Long Island Sound.
The Farmington River is a river, 46.7 miles (75.2 km) in length along its main stem, located in northwest Connecticut with major tributaries extending into southwest Massachusetts. The longest route of the river, from the origin of its West Branch, is 80.4 miles (129.4 km) long, making it the Connecticut River's longest tributary by 2.3 miles (3.7 km) over the major river directly to its north, the Westfield River. The Farmington River's watershed covers 609 square miles (1,580 km2). Historically, the river played an important role in small-scale manufacturing in towns along its course, but it is now mainly used for recreation and drinking water.
Deerfield River is a river that runs for 76 miles (122 km) from southern Vermont through northwestern Massachusetts to the Connecticut River. The Deerfield River was historically influential in the settlement of western Franklin County, Massachusetts, and its namesake town. It is the Connecticut River's second-longest tributary in Massachusetts, 2.1 miles (3.4 km) shorter than Metropolitan Springfield's Westfield River.
The Mascoma River is a 31.6-mile-long (50.9 km) river in western New Hampshire in the United States. It is a tributary of the Connecticut River, which flows to Long Island Sound. The Mascoma comprises two sections which are split by Mascoma Lake in the communities of Enfield and Lebanon. Counting the lake would add 2.7 miles (4.3 km) to the river's length.
The Assabet River is a small, 34.4-mile (55.4 km) long river located about 20 miles (30 km) west of Boston, Massachusetts, United States. The Assabet rises from a swampy area known as the Assabet Reservoir in Westborough, Massachusetts, and flows northeast before merging with the Sudbury River at Egg Rock in Concord, Massachusetts, to become the Concord River. The Organization for the Assabet, Sudbury and Concord Rivers, headquartered in West Concord, Massachusetts, is a non-profit organization dedicated to the preservation, protection, and enhancement of the natural and recreational features of these three rivers and their watershed. As the Concord River is a tributary of the Merrimack River, it and the Assabet and Sudbury rivers are part of the larger Merrimack River watershed.
The Upper Ammonoosuc River is a tributary of the Connecticut River that flows through Coös County in the northern part of the northeastern U.S. state of New Hampshire. Despite its name, the river is not an upstream portion of the Ammonoosuc River, but instead a separate tributary of the Connecticut River flowing from 20 to 60 miles north of the Ammonoosuc.
The Jones River is a 7.5-mile-long (12.1 km) river running through Kingston, Massachusetts. The river drains about 30 square miles (78 km2), has its source in Silver Lake and drains into Kingston Bay. Land surrounding the river is 52% forested, of which 22% has been developed for residential use. There is a USGS stream gauge along 16 square miles (41 km2) of the river and it has measured the flow at 0.7 cubic feet per second (0.020 m3/s) per square mile of drainage area.
Otter Brook is a 13.2-mile-long (21.2 km) river located in southwestern New Hampshire in the United States. It is a tributary of The Branch of the Ashuelot River, itself a tributary of the Connecticut River, which flows to Long Island Sound.
Tarbell Brook is a 10.1-mile-long (16.3 km) stream located in southwestern New Hampshire and northern Massachusetts in the United States. It is a tributary of the Millers River, itself a tributary of the Connecticut River, which flows to Long Island Sound.
The Blackwater River is a 37.5-mile-long (60.4 km) river located in central New Hampshire in the United States. It is a tributary of the Contoocook River, part of the Merrimack River watershed.
The Ware River is a 35.4-mile-long (57.0 km) river in central Massachusetts. It has two forks, its West Branch, which begins in Hubbardston, Massachusetts, and its East Branch, which begins in Westminster, Massachusetts. The Ware River flows southwest through the middle of the state, joins the Quaboag River at Three Rivers, Massachusetts, to form the Chicopee River on its way to the Connecticut River.
The Quinapoxet River is part of the Nashua River watershed in northern Massachusetts in the United States. It is part of the Massachusetts Water Resources Authority water system supplying drinking water to the greater Boston area.
The Five Mile River is a 10.1-mile-long (16.3 km) river in central Massachusetts, part of the Chicopee River watershed. It rises north of Dean Pond in the Town of Oakham within Rutland State Forest and flows south through Dean Pond to Brooks Pond, 2.5 miles (4.0 km) northeast of North Brookfield, then continues south to its mouth at the north end of Lake Lashaway, also in North Brookfield.
The Millers River is a 52.1-mile-long (83.8 km) river in northern Massachusetts, originating in Ashburnham and joining the Connecticut River just downstream from Millers Falls, Massachusetts. Sections of the river are used for whitewater kayaking, and a section upriver is popular with flatwater racers, and the river is known locally as a good place for pike fishing.
The Quinebaug River is a river in south-central Massachusetts and eastern Connecticut, with watershed extending into western Rhode Island. The name "Quinebaug" comes from the southern New England Native American term, spelled variously Qunnubbâgge, Quinibauge, etc., meaning "long pond", from qunni-, "long", and -paug, "pond". The river is one of the namesake rivers in the Quinebaug and Shetucket Rivers Valley National Heritage Corridor.
Coles Brook is a small stream that begins east of Pine Street in Rehoboth, Massachusetts, and flows in a southwest direction to Central Pond and the James V. Turner Reservoir and the on the border of Seekonk, Massachusetts, and East Providence, Rhode Island. It is a tributary of the Ten Mile River.
Spencer State Forest is a Massachusetts state forest and recreation reserve located in the town of Spencer, managed by the Massachusetts Department of Conservation and Recreation. The 92 mile (148 km) Midstate Trail passes through the state forest. The Commonwealth of Massachusetts also conducts logging in some parts of the property.
Stony Brook is a stream largely running through Lincoln and Weston, Massachusetts, then forming the Weston/Waltham boundary, and emptying into the Charles River across from the Waltham/Newton boundary. It has two tributaries, Cherry Brook and Hobbs Brook, and its watershed includes about half of Lincoln and Weston as well as parts of Lexington and Waltham. Since 1887, it has been the water supply for Cambridge, along with the Hobbs Brook Reservoir.
