The Napan River 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 the Miramichi River

Miramichi River

The Miramichi River is a Canadian river located in the east-central part of New Brunswick. The river drains into Miramichi Bay in the Gulf of St. Lawrence...

 in New Brunswick

New Brunswick

New Brunswick is one of Canada's three Maritime provinces and is the only province in the federation that is constitutionally bilingual . The provincial capital is Fredericton and Saint John is the most populous city. Greater Moncton is the largest Census Metropolitan Area...

, 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...

.

The Napan River rises several kilometres southwest of Chatham

Chatham, New Brunswick

Chatham is a Canadian urban neighbourhood in the city of Miramichi, New Brunswick.Prior to municipal amalgamation in 1995, Chatham was an incorporated town in Northumberland County along the south bank of the Miramichi River opposite Douglastown...

 in central Northumberland County

Northumberland County, New Brunswick

Northumberland County , having the largest area of any county in the province, is located in northeastern New Brunswick, Canada.-Geography:Northumberland County is covered by thick forests, whose products stimulate the economy...

 and flows northeast into the Miramichi River at Napan Bay.

The Napan River watershed is mostly rural, dominated by forests and small farms in the communities of Glenwood

Glenwood, New Brunswick

Glenwood is an unincorporated community in Restigouche County, New Brunswick, Canada.-References:...

, Upper Napan, Centre Napan, Lower Napan, and Napan Bay.

The river is tidal below Lower Napan.