Road trip from San Marcos to Round Rock

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Find out how many hours from San Marcos to Round Rock by car if you're planning a road trip. If you want to explore small towns along the way, get a list of cities between San Marcos, CA and Round Rock, TX. Looking for alternate routes? Explore all of the routes from San Marcos, CA to Round Rock, TX. Compare the flight distance to driving distance from San Marcos, CA to Round Rock, TX, or check for a bus or train from San Marcos, CA to Round Rock, TX. Calculate the total cost to drive from San Marcos, CA to Round Rock, TX. Or find out if it's better to fly or drive from San Marcos, CA to Round Rock, TX?