From its source in New Hampshire's White Mountains to its mouth at Saco-Biddeford, the Saco River draws visitors and residents alike to swim, fish, canoe, and white-water kayak. The Saco brought tourists to the White Mountains and influenced the development of both large and small towns, shaping their history and creating bustling centers of industry. The Saco River documents the river through postcards from 1905 to the 1940s, when mills dominated the landscape.