Carlsbad Caverns to San Marcos, Texas: Road Trip Guide & Distance

How far is Carlsbad Caverns from San Marcos, Texas?

The distance from Carlsbad Caverns to San Marcos, Texas is 421.7 miles (678.7 km) as the crow flies. San Marcos, Texas is located ESE of Carlsbad Caverns. By car, the driving distance is approximately 506 miles, taking about 10h 11min. A direct flight would take roughly 1h 21min. Both are located in United States — Carlsbad Caverns in New Mexico and San Marcos, Texas in Texas.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility.

Coordinates come from public place data for Carlsbad Caverns and San Marcos, Texas. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.