This is an entry in our Disneyland 101 Glossary: Disneyland Resort definitions in under 101 words, from Mouse Brief.
Rivers of America is the large body of water found in the western portion of Disneyland Park. It is primarily in Frontierland, but New Orleans Square and Critter Country also share some shoreline. The Rivers of America plays host in daylight hours to the Mark Twain Riverboat, Sailing Ship Columbia, Davy Crockett’s Explorer Canoes and rafts to its central island boasting the Pirate’s Lair on Tom Sawyer Island. On select evenings, it is the stage for the nighttime spectacular Fantasmic! The Rivers of America features several little vignettes that can be seen from the various watercraft or the Disneyland Railroad.