The Hondo River or Río Hondo ([ˈri.o ˈondo]) is a river of Central America, approximately 150 kilometres (93 mi) long, 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 size of the Hondo basin is 2,688.5 km² (1,038 sq ml).
The river is formed from the confluences of several upper tributaries, such as Blue Creek and Chan Chich (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 Hondo River near the settlements of Blue Creek Village, on the Belizean side, and La Unión on the Mexican side. The river continues its northeastern course with few other settlements along its length until reaching its outlet in Chetumal Bay. The city of Chetumal, capital of the Mexican state of Quintana Roo and the region's main port, lies close to this outlet.
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