Indian Stream is 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...

, approximately 19.1 miles (30.9 km) long, in 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 rises in the mountains of extreme northern New Hampshire, in Coos County

Coos County, New Hampshire

-National protected areas:*Umbagog National Wildlife Refuge *Silvio O. Conte National Fish and Wildlife Refuge *White Mountain National Forest -Demographics:...

 near the U.S.

United States

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

-Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 border, where the Middle Branch of Indian Stream joins the West Branch. Indian Stream flows south-southwest, joining the Connecticut two miles (3.2 km) downstream from the village of Pittsburg

Pittsburg, New Hampshire

Pittsburg is a town in Coos County, New Hampshire, United States. The population was 869 at the 2010 census. It is the northernmost town in New Hampshire and the largest town by area in the state - and in New England as well - more than twice the size of the next largest town, Lincoln. U.S...

.

The area around Pittsburg was the subject of a border dispute in the 1830s between the United States and Canada, leading to the short-lived, self-proclaimed Republic of Indian Stream

Republic of Indian Stream

The Republic of Indian Stream was a small, unrecognized, constitutional republic in North America, along the section of the US–Canada border that divides the Canadian province of Quebec from the US state of New Hampshire. It existed from July 9, 1832 to 1835...

. The border dispute, based upon an ambiguity in the Treaty of Paris (1783)

Treaty of Paris (1783)

The Treaty of Paris, signed on September 3, 1783, ended the American Revolutionary War between Great Britain on the one hand and the United States of America and its allies on the other. The other combatant nations, France, Spain and the Dutch Republic had separate agreements; for details of...

, was resolved in 1842, with the river drainage and the land lying east of Halls Stream

Halls Stream

Halls Stream is a 25.2 mile long tributary of the Connecticut River. For most of its length, it forms the boundary between Canada and the United States, with the province of Quebec to its west and the state of New Hampshire to its east....

established as part of the state of New Hampshire.