The Dead Diamond River is an 18.7 mile long (30.2 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...

 in northern 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...

. Its water enters the Atlantic Ocean

Atlantic Ocean

The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

 on the coast of Maine

Maine

Maine is a state in the New England region of the northeastern United States, bordered by the Atlantic Ocean to the east and south, New Hampshire to the west, and the Canadian provinces of Quebec to the northwest and New Brunswick to the northeast. Maine is both the northernmost and easternmost...

 by passing through the Magalloway

Magalloway River

The Magalloway River is a river in northwestern Maine and northern New Hampshire in the United States. It is a tributary of the Androscoggin River, which flows to the Kennebec River at Merrymeeting Bay in Maine, near the Atlantic Ocean...

, Androscoggin

Androscoggin River

The Androscoggin River is a river in the U.S. states of Maine and New Hampshire, in northern New England. It is long and joins the Kennebec River at Merrymeeting Bay in Maine before its water empties into the Gulf of Maine on the Atlantic Ocean. Its drainage basin is in area...

, and Kennebec

Kennebec River

The Kennebec River is a river that is entirely within the U.S. state of Maine. It rises in Moosehead Lake in west-central Maine. The East and West Outlets join at Indian Pond and the river then flows southward...

 rivers.

The Dead Diamond River is formed in the township of Atkinson and Gilmanton Academy Grant, New Hampshire

Atkinson and Gilmanton Academy Grant, New Hampshire

Atkinson and Gilmanton Academy Grant is a township in Coos County, New Hampshire, United States. It was granted by the state legislature to Gilmanton Academy and Atkinson Academy in equal shares in 1809 and contained about . It was later expanded by annexation of previously ungranted land to the...

 by the juncture of the Middle Branch

Middle Branch Dead Diamond River

The Middle Branch of the Dead Diamond River is a 9.0 mile long river in northern New Hampshire in the United States. It is a tributary of the East Branch of the Dead Diamond River, located in the Androscoggin River watershed of Maine and New Hampshire.The Middle Branch flows for most of its...

 and the East Branch

East Branch Dead Diamond River

The East Branch of the Dead Diamond River is a long river in northern New Hampshire in the United States. It is a tributary of the Dead Diamond River, located in the Androscoggin River watershed of Maine and New Hampshire....

 of the Dead Diamond. It is quickly joined by the West Branch

West Branch Dead Diamond River

The West Branch of the Dead Diamond River is a 2.7 mile long river in northern New Hampshire in the United States. It is a tributary of the Dead Diamond River, located in the Androscoggin River watershed of Maine and New Hampshire....

 of the Dead Diamond and heads south through logging

Logging

Logging is the cutting, skidding, on-site processing, and loading of trees or logs onto trucks.In forestry, the term logging is sometimes used in a narrow sense concerning the logistics of moving wood from the stump to somewhere outside the forest, usually a sawmill or a lumber yard...

 country. The Little Dead Diamond River

Little Dead Diamond River

The Little Dead Diamond River is a 7.1 mile long river in northern New Hampshire in the United States. It is a tributary of the Dead Diamond River, located in the Androscoggin River watershed of Maine and New Hampshire....

 joins from the west at Hell Gate, a set of rapids, just before the Dead Diamond enters the Dartmouth College Grant

Second College Grant, New Hampshire

Second College Grant is a township located in Coos County, New Hampshire, United States. The area of this township is owned and controlled by Dartmouth College. As of the 2010 census, the grant had a total population of 0....

. The river traverses the length of the college grant before reaching the Magalloway River near the Maine border. The Swift Diamond River

Swift Diamond River

The Swift Diamond River is a 17.8 mile long river in northern New Hampshire in the United States. It is a tributary of the Dead Diamond River, located in the Androscoggin River watershed of Maine and New Hampshire....

is a significant tributary which joins the Dead Diamond shortly upstream of the Magalloway.