San Marcos River — Rio Vista Park

Amenities

About

The San Marcos River originates from hundreds of springs at the heart of the city of San Marcos and flows at a constant 72°F year-round, fed by the San Marcos segment of the Edwards Aquifer. Rio Vista Park, a 13-acre city park built around Rio Vista Dam, serves as the traditional terminus of the popular tubing float and offers swimming, kayaking, and a scenic riverside pavilion — all with no admission or parking fee. The Lions Club Tube Rental operates a shuttle service from City Park to Rio Vista, charging $25 per tube with unlimited return trips, making the roughly one-hour float easily repeatable. Beyond tubing, the crystal-clear spring water supports snorkeling, stand-up paddleboarding, and catch-and-release fishing for bass and sunfish. The San Marcos River is designated a State Scientific Area due to its rare and endemic aquatic species, including Texas wild rice and the Fountain Darter. Styrofoam of any kind is prohibited on the river to protect this fragile ecosystem, and life vests are strongly recommended for children and weaker swimmers.

Shade Details

Cypress and pecan shade along the river corridor; open in some sections near the dam.

Conditions & Tips

The 72°F water is the main draw in summer. Tube rentals available. Texas State University campus nearby. Combine with a visit to Wonder World Cave.

Spring-fed — largely drought-proof, though flow reduces slightly in severe drought.

Best Time to Visit

Trails

Who It's For

Kayaking