The Mattawamkeag River is a river located in northern Maine, flowing approximately 50 miles. It originates from the confluence of the Mattawamkeag and Penobscot rivers and eventually joins the Penobscot River. The river is known for its scenic beauty and is surrounded by forests and wildlife. The river is popular for various recreational activities, including fishing, kayaking, and canoeing. It supports a diverse ecosystem, home to species such as salmon and trout. The Mattawamkeag River also plays a role in the local economy, providing resources for tourism and outdoor activities.