Roberto's River is a reference to the Rio Grande, which is a river that forms part of the border between the United States and Mexico. It is the fourth longest river in North America and is 1, 896 miles long. The Rio Grande originates in the San Juan Mountains of Colorado and flows south through New Mexico and Texas before emptying into the Gulf of Mexico. It is an important source of water for both countries and is used for irrigation, drinking water, and hydroelectric power.