If you're traveling southbound on loop 410 from Hwy 151 (Seaworld Exit), take Hwy 90 West (Del Rio exit). Stay to the right to enter Hwy 90 West and you will see ExploreUSA on your right.

If you're traveling from downtown San Antonio, take Hwy 90 West until you hit Loop 410, and then take the Loop 410 SOUTH exit which crosses over Loop 410. As you're crossing over you will see the ExploreUSA sales center on your right. Turn right on Tomar, then right on Tarasco, then right on Bertetti, and then right on the access road.