The Little River is a 7.2 mile long (11.6 km) river largely in the town of Exeter in Rockingham County, New Hampshire, it is a tributary of the Exeter River, part of the Great Bay/Piscataqua River watershed in which New Hampshire region, the southeast area of the U.S. state of New Hampshire that includes the eastern portion of Rockingham County and the southern portion of Strafford County?