Running a length of approximately 1,900 miles (3,060 km) this river's headwaters are located in the San Juan Mountains of southern Colorado. What is the name of this river that creates much of the natural border between Texas and Mexico?

The Rio Grande is the 5th longest river in North America and 20th longest in the world. The river forms much of the natural border between Texas and Mexico, though due to the riverbed shifting over the years, places where the border used to be the river, are now on land.

Asked by Jason Forbes · Last updated 5 years ago · 256.5K views · SOURCE