Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Rio Hondo is a river of Central America, approximately 150 km (93.2 mi) in length, which flows in a northeasterly direction to discharge into Chetumal Bay on the Caribbean Sea. Most of the international border between the nations of Mexico and Belize runs along its length. The river is formed from the confluences of several upper tributaries, such as the Río Azul (later Blue Creek in Belize) and Chanchich (Rio Bravo) which have their sources in Guatemala's Petén Basin region, and Booth's River which originates in the western Belizean district of Orange Walk. These tributaries join to form the Rio Hondo near the settlements of Blue Creek Village, on the Belizean side, and La Unión on the Mexican side.