The South Branch of the Israel River is a 6.8 miles (10.9 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...

 in the White Mountains

White Mountains (New Hampshire)

The White Mountains are a mountain range covering about a quarter of the state of New Hampshire and a small portion of western Maine in the United States. Part of the Appalachian Mountains, they are considered the most rugged mountains in New England...

 of 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 of the Israel River

Israel River

The Israel River is a river in the White Mountains of New Hampshire. It arises in the township of Low and Burbank's Grant and runs 24 miles generally northwest along U.S. Highway 2, traversing the towns of Jefferson and Lancaster, before joining the Connecticut River...

 and part 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...

 watershed

Drainage basin

A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

. For most of its length, it is within the White Mountain National Forest

White Mountain National Forest

The White Mountain National Forest is a federally-managed forest contained within the White Mountains in the northeastern United States. It was established in 1918 as a result of the Weeks Act of 1911; federal acquisition of land had already begun in 1914. It has a total area of...

.

The South Branch rises on the western slopes of Mount Jefferson

Mount Jefferson (New Hampshire)

Mount Jefferson is located in Coos County, New Hampshire, and is the third highest mountain in the state. The mountain is named after Thomas Jefferson, the third president of the United States, and is part of the Presidential Range of the White Mountains...

 in the Presidential Range

Presidential Range

The Presidential Range is a mountain range located in the White Mountains of the U.S. state of New Hampshire. Containing the highest peaks of the Whites, its most notable summits are named for American Presidents, followed by prominent public figures of the 18th and 19th centuries.Mt...

 of the White Mountains. It flows west, between the Ridge of the Caps to the south and Castellated Ridge to the north, then turns northwest when it reaches the Jefferson Notch Road. The river parallels the notch road and enters the town of Jefferson

Jefferson, New Hampshire

Jefferson is a town in Coos County, New Hampshire, United States. The population was 1,107 at the 2010 census. It is home to parts of the White Mountain National Forest in the south and northeast and to two theme parks: Santa's Village and...

, where it joins the Israel River.