Sís River

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Sís River is a river in southwest Guatemala. It starts in the Sierra Madre mountains on the slopes of the Santo Tomás and Zunil volcanoes in the Suchitepéquez department. The river flows south through the towns of San Francisco Zapotitlán, Cuyotenango, San Lorenzo, and Mazatenango. It joins the Icán River, which flows to the Pacific Ocean. The Sís–Icán river basin covers about 919 square kilometers (355 square miles). The source is about 1,200 meters (3,900 feet) above sea level, and the river ends at sea level where it meets the Icán River.