The Loire is the longest river in France, stretching for over 1, 000 kilometers from its source in the Massif Central to the Atlantic Ocean. It is the longest river entirely within France and is the second-longest river in the country after the Rhône. The Loire is also known for its many tributaries, including the Allier, Cher, Indre, Vienne, and Sèvre Nantaise rivers. It is a major waterway for transportation and is home to many species of fish, birds, and other wildlife.