Motagua River
Mountains cross the department from north to south, crossing from the border with Jalapa and joining the Sierra del Merendón range, which extends into neighbouring Honduras and El Salvador. Chiquimula possesses two drainage basins, one flowing towards the Atlantic Ocean, the other towards the Pacific Ocean. The principal river in the department is the Río Grande, or Camotán River, which flows in from Honduras, before becoming the Jocotán River, and flowing into the Motagua River to eventually drain into the Caribbean Sea. In the south of the department, the most important rivers are the Anguiatú and the Ostúa.