The Merrimack River Flows Through New England—Not Missouri

The Merrimack River is a 117-mile waterway in the northeastern United States, rising in central New Hampshire and flowing south through Massachusetts to empty into the Atlantic at Newburyport. Missouri, located in the Midwest, is over 1,000 miles away. The two share no hydrological connection; the Merrimack's watershed is entirely within New England. Confusion may arise from similar-sounding names (e.g., the Missouri River), but the Merrimack has never crossed the Mississippi, let alone reached the Show-Me State.