In Brownsville exit HWY 77 at Boca Chica Blvd and head east. Continue on Boca Chica Blvd 15-20 miles. You will see a Border Patrol Check Point. Approximately 5 minutes later you will see the American Firing Range on your left. The following GPS cords will give you an idea with Google maps or GPS.  25° 57' 2" N, 97° 19' 30" W