The Suchiate River (Spanish: Río Suchiate, Spanish pronunciation: [suˈtʃjate]) is a river that marks the southwesternmost part of the border between Mexico (state of Chiapas) and Guatemala (department of San Marcos). From its sources on the southern slopes of the Tacaná volcano in the Sierra Madre range of Guatemala, the river flows in a south-southwesterly direction to the border with Mexico at Unión Juárez (15.070549°N 92.059722°W (Sources Río Suchiate)), past the border towns Talismán and El Carmen, and then Ciudad Tecún Umán and Ciudad Hidalgo (Chiapas) further downstream, where the Puente Rodolfo Robles and a railway bridge cross the river, and on to the Pacific Ocean.