The Branch is a 2.6 mile long (4.2 km) river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 located entirely in the city of Keene

Keene, New Hampshire

Keene is a city in Cheshire County, New Hampshire, United States. The population was 23,409 at the 2010 census. It is the county seat of Cheshire County.Keene is home to Keene State College and Antioch University New England, and hosts the annual Pumpkin Fest...

, in southwestern New Hampshire

New Hampshire

New Hampshire is a state in the New England region of the northeastern United States of America. The state was named after the southern English county of Hampshire. It is bordered by Massachusetts to the south, Vermont to the west, Maine and the Atlantic Ocean to the east, and the Canadian...

 in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is a tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Ashuelot River

Ashuelot River

The Ashuelot River is a tributary of the Connecticut River, approximately long, in southwestern New Hampshire in the United States. It drains a mountainous area of , including much of the area known as the Monadnock Region...

, itself a tributary of the Connecticut River

Connecticut River

The Connecticut River is the largest and longest river in New England, and also an American Heritage River. It flows roughly south, starting from the Fourth Connecticut Lake in New Hampshire. After flowing through the remaining Connecticut Lakes and Lake Francis, it defines the border between the...

, which flows to Long Island Sound

Long Island Sound

Long Island Sound is an estuary of the Atlantic Ocean, located in the United States between Connecticut to the north and Long Island, New York to the south. The mouth of the Connecticut River at Old Saybrook, Connecticut, empties into the sound. On its western end the sound is bounded by the Bronx...

.

While itself a very short river, The Branch is formed by the confluence of the much-longer Otter Brook and Minnewawa Brook and was sometimes considered in the past to be part of Otter Brook. A 1982 decision by the federal Board on Geographic Names established the name "The Branch".

The Branch is paralleled for its entire length by New Hampshire Route 101

New Hampshire Route 101

New Hampshire Route 101 is a state-maintained highway in southern New Hampshire extending from Keene to Hampton Beach. It is the major east–west highway in the southern portion of the state....

.