The Tuxpan River, also known as the Coahuayana River, is a river of Mexico. It originates in the Trans-Mexican Volcanic Belt south of Lake Chapala. It flows southwards through Tuxpan Municipality, Jalisco, and then forms the eastern border of Colima with Michoacán before emptying into the Pacific Ocean.
See also List of rivers of Mexico
References
Atlas of Mexico, 1975 (http://www.lib.utexas.edu/maps/atlas_mexico/river_basins.jpg). The Prentice Hall American World Atlas, 1984. Rand McNally, The New International Atlas, 1993.