The Lamprey River is a 50.2-mile-long waterway in New Hampshire flowing from the Saddleback Mountains through Meadow Lake in Northwood and ultimately emptying into Great Bay, a tidal inlet of the Atlantic Ocean. Known as one of New Hampshire's most significant rivers, it travels through 14 municipalities in Rockingham County and features five main tributaries: North Branch, Pawtuckaway, North, Little, and Piscassic Rivers. The Lamprey serves as an important water source and is classified as a Class B river (fishable and swimmable). With excellent water quality, the river supports diverse ecosystems within its surrounding wetlands and floodplains. Historically, the river powered sawmills and gristmills, with Wiswall Falls Mills in Durham being one of the most notable. Today, the Lamprey River is a popular recreational destination featuring various landscapes including streams, rapids, and the scenic Packers Falls in Durham. It has been recognized for its outstanding natural and cultural resources, with portions designated as a Wild and Scenic River by the federal government and protected under New Hampshire's Rivers Management and Protection Program.