Heading South on I-35

Take Exit 473 towards FM Rd 3163/Milam Rd
Turn Left on Milam RD E (the bridge)
Turn Right onto 1-35 Frontage Rd
Stay on Frontage Rd going Northbound 
Turn Right into Dragway

Heading North on I-35

Take exit 474 Cowling Rd
Stay on Frontage Rd 
Turn Right into Dragway