Tubing in San Marcos, Texas, is a beloved local tradition centered on the spring-fed San Marcos River, which stays a constant 22∘C year-round. To start, you typically visit an "outfitter" like Lions Club Tube Rental or Texas State Tubes. You pay a fee for the tube rental and a shuttle pass. The most popular route is the "City Float," which starts at City Park and ends at Rio Vista Park, taking about 45 to 90 minutes. For a longer, more party-oriented experience, many people choose the "Don's Fish Camp" or "Texas State Tubes" routes further downstream, which can last 3 hours. Essential rules include a strict "No Glass and No Styrofoam" policy to protect the river's ecosystem. You should bring a "cooler tube" for drinks and plenty of waterproof sunscreen. Since the river has some small rapids and chutes (especially at Rio Vista), it is highly recommended to wear water shoes or secure sandals, as flip-flops are frequently lost to the current.