The Susquehanna River, one of the longest rivers on the East Coast of the United States, stretches approximately 444 miles from its source in Cooperstown, New York, to its mouth at the Chesapeake Bay. Its watershed encompasses parts of New York, Pennsylvania, and Maryland, providing drinking water and supporting diverse ecosystems. Historically, the Susquehanna played a vital role in transportation and industry, and today it remains a significant resource for recreation, agriculture, and hydroelectric power. While facing challenges from pollution and development, efforts are ongoing to protect and restore the health of this vital river system.