what is the name of the river that forms in the southern border of the united states
There are 2 rivers that forms the southern border of the united states. - The Rio Grande (RÃ­o Bravo del Norte): from its mouth on the Gulf of Mexico a distance of 1,254 miles (2,019 km) to a point just upstream of El Paso, and Ciudad JuÃ¡rez. -The Colorado River Delta, that covers 24 miles (38 km). Alex Â· 10 years ago.