Frazier Brook is a 7.7 miles (12.4 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...

 located in central 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...

. Via the Blackwater

Blackwater River (Contoocook River)

The Blackwater River is a river located in central New Hampshire in the United States. It is a tributary of the Contoocook River, part of the Merrimack River watershed....

 and Contoocook

Contoocook River

The Contoocook River is a river in New Hampshire. It flows from Pool Pond and Contoocook Lake on the Jaffrey/Rindge border to Penacook , where it empties into the Merrimack River. It is one of only a few rivers in New Hampshire that flow in a predominantly northward direction...

 rivers, it is part of the Merrimack River

Merrimack River

The Merrimack River is a river in the northeastern United States. It rises at the confluence of the Pemigewasset and Winnipesaukee rivers in Franklin, New Hampshire, flows southward into Massachusetts, and then flows northeast until it empties into the Atlantic Ocean at Newburyport...

 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...

. It is subject to the New Hampshire Comprehensive Shoreland Protection Act.

Frazier Brook begins in Danbury, New Hampshire

Danbury, New Hampshire

In 1800, there were 165 people living in Danbury, according to the first official census.As of the 2000 census, there were 1,071 people, 435 households, and 310 families residing in the town. The population density was 28.6 people per square mile . There were 596 housing units at an average...

, just south of the town center, and flows south through the town of Wilmot

Wilmot, New Hampshire

Wilmot is a town in Merrimack County, New Hampshire, United States. The population was 1,358 at the 2010 census. Wilmot is home to Winslow State Park and a small part of Gile State Forest.-History:...

 into Andover

Andover, New Hampshire

Andover is a town in Merrimack County, New Hampshire, United States. The population was 2,371 at the 2010 census. Andover includes the villages of Cilleyville, Potter Place, and East Andover, in addition to the town center...

. Eagle Pond and Bog Pond interrupt the brook's flow. Shortly below Bog Pond, the brook reaches the Blackwater River at the village of Cilleyville.

Frazier Brook is paralleled for most of its length by U.S. Route 4

U.S. Route 4

U.S. Route 4 is a long United States highway that runs from East Greenbush, New York, in the west to Portsmouth, New Hampshire, in the east, traversing through Vermont.In New York, US 4 is signed north–south to reflect its alignment in the state...

.