Leave airport on Sunport Blvd. -- stay to your left on the exiting lane of the parking lot; you will then be heading West. Cross over the bridge and turn left at the stop sign -- this will put you on I-25 going South. When you see the exit for Socorro (exit 150), take it. This will put you on California Avenue, the main street in town, going South.

Take I-25 north from Las Cruces, and take either the first (exit 147) or second (exit 150) exit for Socorro. Exit 147 will put you on California Avenue, the main street in town, going North; exit 150 will put you on California Avenue going South.