The North Branch of the Sugar River is a 10.1 mile (16.2 km) long 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 in western 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 Sugar River

Sugar River (New Hampshire)

The Sugar River is a 27.0 mile long river located in western New Hampshire in the United States. It is a tributary of the Connecticut River, which flows to Long Island Sound....

, which flows to 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...

.

The North Branch of the Sugar River begins at the confluence of Sawyer Brook and Stocker Brook

Stocker Brook

Stocker Brook is a 2.9 mile long stream located in western New Hampshire in the United States. It is a tributary of the North Branch of the Sugar River, part of the Connecticut River and Long Island Sound drainage basin....

 in the town of Grantham, New Hampshire

Grantham, New Hampshire

Grantham is a town in Sullivan County, New Hampshire, United States. The population was 2,985 at the 2010 census. This made Grantham the fastest growing town numerically in Sullivan County between the 2000 and 2010 censuses...

. The river flows south through the town of Croydon

Croydon, New Hampshire

Croydon is a town in Sullivan County, New Hampshire, United States. The population was 764 at the 2010 census.- History :Incorporated in 1763, the town takes its name from Croydon, a suburb of London, England.- Geography :...

, reaching the Sugar River in the town of Newport

Newport, New Hampshire

Newport is a town in and the county seat of Sullivan County, New Hampshire, United States. It is west-northwest of Concord. The population was 6,507 at the 2010 census. A covered bridge is in the northwest...

. In Croydon, the river's flow is interrupted by Spectacle Pond, a 40 acres (16.2 ha) two-lobed lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

. New Hampshire Route 10

New Hampshire Route 10

New Hampshire Route 10 is a north–south state highway in the U.S. state of New Hampshire. Its southern terminus is at the Massachusetts state line in the town of Winchester. In Massachusetts the highway becomes Massachusetts Route 10. Total length of the highway is .-Route description:NH 10...

follows the North Branch for nearly its entire length.