The Deer River is a 2.6 mile long (4.2 km) stream

Stream

A stream is a body of water with a current, confined within a bed and stream banks. Depending on its locale or certain characteristics, a stream may be referred to as a branch, brook, beck, burn, creek, "crick", gill , kill, lick, rill, river, syke, bayou, rivulet, streamage, wash, run or...

 in eastern 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 Silver Lake

Silver Lake (Madison, New Hampshire)

Silver Lake is a water body located in Carroll County in eastern New Hampshire, in the town of Madison. The village of Silver Lake within Madison lies at the north end of the lake...

, part of the Ossipee Lake

Ossipee Lake

Ossipee Lake is located in Carroll County in eastern New Hampshire, in the communities of Ossipee and Freedom. At 3,245 acres, it is the sixth-largest lake located entirely in New Hampshire. The lake is fed by the West Branch , the Bearcamp and Lovell rivers , and the Pine River...

 / Saco River

Saco River

The Saco River is a river in northeastern New Hampshire and southwestern Maine in the United States. It drains a rural area of of forests and farmlands west and southwest of Portland, emptying into the Atlantic Ocean at Saco Bay, from its source. It supplies drinking water to roughly 250,000...

 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...

 leading to 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...

.

The Deer River lies entirely within the town of Madison, New Hampshire

Madison, New Hampshire

Madison is a town in Carroll County, New Hampshire, United States. The population was 2,502 at the 2010 census. Madison includes the village of Silver Lake.- History :...

. It begins at a wetland where Ham Brook and Salter Brook join, then flows south through woodlands to the village of Silver Lake

Silver Lake, New Hampshire

Silver Lake is a village located at the north end of Silver Lake in the town of Madison, New Hampshire, in Carroll County, New Hampshire, United States. Joy Farm, summer home of E. E. Cummings, is a National Historic Landmark located north of the village....

, where it enters the north end of Silver Lake, the water body.