The Penobscot River is a 109-mile-long river in the US state of Maine. It originates from several sources in the northern part of the state, and flows southwards into Penobscot Bay. The Penobscot River is one of the most important rivers in Maine, as it is used for fishing, boating, and transportation. It is also a popular tourist destination, as its scenic beauty and rich history make it an ideal spot for outdoor activities. Synonyms for the Penobscot River include the Penobscot, the Piscataquis River, and the Kenduskeag Stream.