The Fowler River is a 6.1 miles (9.8 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...

 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...

. It is an inflow to Newfound Lake

Newfound Lake

Newfound Lake is located in Grafton County, New Hampshire, USA, within the towns of Bridgewater, Bristol, Alexandria, and Hebron. The lake is located in a section of New Hampshire known as the Lakes Region. At 4,451 acres, it is the third-largest lake located entirely in New Hampshire. The lake's...

, part of the Pemigewasset River

Pemigewasset River

The Pemigewasset River , known locally as "The Pemi", is a river in the state of New Hampshire, the United States. It is in length and drains approximately...

 and therefore 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...

 watersheds

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...

. Below Bog Brook, the Fowler River is subject to the New Hampshire Comprehensive Shoreland Protection Act.

The river begins as Clark Brook on the east slopes of Mount Cardigan

Mount Cardigan

Mount Cardigan is a prominent bare-rock summit in the towns of Orange and Alexandria in western New Hampshire. While its peak is only above sea level, it has extensive areas of bare granite ledges and alpine scrub, giving it the feel to hikers of a much higher mountain...

 in the town of Alexandria, New Hampshire

Alexandria, New Hampshire

Alexandria is a town in Grafton County, New Hampshire, United States. The population was 1,613 at the 2010 census. Newfound Lake is in the northeast corner, with Wellington State Park on the western shore. The town is home to Welton Falls State Forest. Cardigan State Park, with Mount Cardigan,...

, dropping over Welton Falls. The brook becomes the Fowler River with the juncture of Chesley Brook from the north, at which point the river valley widens and begins to support small agricultural operations. The Fowler River flows southeast to a junction with Bog Brook, where it turns north and flows one mile to Newfound Lake.