If you are traveling south from Corpus, be sure to get gas there. Shortly after Corpus, a long stretch of desert begins: there are no gas stations until you get to the valley, no towns along the way, just ranches and barbed wire. If you run out of gas, you will have a hard time getting help.
DEPENDS ON WHERE YOUR COMING FROM...IN THE STATES
DRIVE....FROM ELSEWHERE....FLY....UNLESS YOUR COMING FROM MEXICO.....THIS IS THE HIDALGO INTERNATIONAL BRIDGE....JUST 10 MINUTES FROM McALLEN....CROSS THE BRIDGE AND YOUR IN REYNOSA MEXICO....BEWARE...TOURIST TRAP.
RENT A CAR.