Piscassic River

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The Piscassic River is a 15.3 mile long (24.6 km) river located in southeastern New Hampshire in the United States. It is a tributary of the Lamprey River, part of the Great Bay and Piscataqua River watershed leading to the Atlantic Ocean.

The river rises in the northeast corner of Fremont, New Hampshire and flows east across flat, swampy terrain through the town of Epping. Upon reaching the town of Newfields, where it is joined by the Fresh River, the river turns northeast and winds through rolling terrain to Newmarket, where it reaches the Lamprey River.

The lower part of the Piscassic River was once used as a canal between Neal's Mills in Newfields and the mouth of the Piscassic at the Lamprey River. A small pond which was used to unload and turn barges is located at the base of a rapids just downstream from the ruins of Neal's Mills, between Piscassic Road bridge and the B&M railroad bridge in Newfields. A mule track runs along the northwest bank of the Piscassic downstream from the turning pond.