1,122 kilometers (699 miles) are fenced, from El Paso, TX westward to San Diego, CA. Some stretches along the Rio Grande River are also fenced, specially close to urban areas, but the amount in kilometers is variable.
To the US-Mexico border? Northern Mexico is close to the border.
Montana does not border Mexico.
Pretty much just Canada and Mexico.
Rio Grande River
The states that border Mexico are California, Arizona, New Mexico and Texas...
Yes, Mexico does border the U.S
None. Mexico's border touches New Mexico's state limit (and US border).They share a common border.
US-Mexico border ("Frontera Mexico-Estados Unidos").
It is called US-Mexico border. If you mean the name of the river that defines much of that border, it is called the Rio Grande river (or Rio Bravo del Norte in Mexico).
Which state has a longer border with Mexico, Texas or New Mexic?
None. Mexican deserts are located in northern Mexico, close to the US-Mexico border. These include the Sonoran desert to the northwest, along the Mexico-Arizona border, and the Chihuahuan desert, to the northeast from the New Mexico-Mexico Border to the Mexico-Texas border.