Walking in San Marcos is most enjoyable in the downtown area and along designated trails. However, the city is generally car-dependent, with limited pedestrian infrastructure in many neighborhoods. While walking can be a pleasant way to explore certain areas, the hot Texas summers and lack of shade in some parts may make it less comfortable during peak temperatures. Distances between key locations can also be a factor, as some destinations may be spread out. Overall, walking is best suited for specific areas rather than as a primary mode of transportation across the city.

Cyklistické trasy v San Marcos podporují cyklopruhy, sdílené a parkové stezky, takže se v určitých oblastech dá snadno projíždět. Město má víc než 100 mil cyklistické infrastruktury, která spojuje různé cíle. V některých oblastech ale kvůli provozu nebo omezeným trasám pro cyklisty může být nutná opatrnost. Terén je obecně zvládnutelný, ale vzdálenosti mezi klíčovými místy se můžou lišit. Podmínky pro cyklisty jsou ovlivněné počasím, které může být horké a vlhké, takže je důležité hydratovat a chránit se před sluncem.

Public transit in San Marcos includes bus services that connect various parts of the city and surrounding areas. The local bus system offers routes that are accessible and convenient for getting around town. Additionally, the Bobcat Shuttle provides free rides to students and the general public, with designated stops throughout the city. While buses are a practical option for many destinations, their schedules and routes may require planning ahead. The city’s infrastructure supports these services, making public transit a useful choice for navigating San Marcos efficiently.