The canyon walls are 1,500 ft high and carved out of thick layers of limestone.

The canyon length is a matter of some debate, with estimates ranging from 5 miles to 17 miles, depending on the chosen endpoint.

[2] The Rio Grande river currents through the canyon are rated up to Class II.

[3] Boquillas means "little mouths" in Spanish, perhaps a reference to the canyon's narrow mouth.

This article about a location in Brewster County, Texas is a stub.