30 Mi.
30 miles
Distance between San Marcos and San Antonio Texas:Using I-35 - 50 milesTravel Time: about 50min
The driving distance from Austin Texas to San Marcos Texas is 32 miles via I-35 S per Map Quest. The driving time per Map Quest is 33 minutes.
It is 32.1 miles and Google Maps estimates the driving time as 38 minutes.
The shortest driving distance is 166 miles.
165 miles
1,673 miles
About 415 miles
About 205 miles
244 miles
About 40 miles
Roughly 50 miles