Its tributaries include the Salado, Conchos, and Puerco, and its basins include Lake Toronto and the Falcon Reservoir. Its sources lie in the San Juan Mountains, and its early course flows into the San Luis Valley. Before it flows into the Gulf Coastal Plain, this river flows into the Big Bend, and 
Its tributaries include the Salado, Conchos, and Puerco, and its basins include Lake Toronto and the Falcon Reservoir. Its sources lie in the San Juan Mountains, and its early course flows into the San Luis Valley. Before it flows into the Gulf Coastal Plain, this river flows into the Big Bend, and it is the fifth longest river in North America. For 10 points, name this river on which lie Ciudad Juarez and El Paso, the border between Mexico and the United States.
Its tributaries include the Salado, Conchos, and Puerco, and its basins include Lake Toronto and the Falcon Reservoir.