Belize–Guatemala border
The Belize–Guatemala border is an almost straight line 266 km (165 mi) long, close to the 89th meridian west, which separates the west of Belize's territory from Guatemala's. == Border description and history == The border between Belize and Guatemala is defined in Article I of the Wyke–Aycinena Treaty of 1859: Beginning at the mouth of the River Sarstoon in the Bay of Honduras, and proceeding up the mid-channel thereof to Gracias a Dios Falls; then turning to the right and continuing by a line drawn direct from Gracias a Dios Falls to Garbutt's Falls on the Mopan River, and from Garbutt's Falls due north until it strikes the Mexican frontier.