Extending for 284 km, the Belize–Mexico land boundary follows the Hondo River for almost the entirety of the border’s length. The boundary was defined in an 1893 treaty signed between the United Kingdom and Mexico, as Belize was then the colony of British Honduras. The course of the boundary has remained the same, and there are no border disputes between the two countries, but there is ambiguity surrounding the course of the boundary from the mouth of the Hondo River through Chetumal Bay.