Tube Excursion

On the banks of the spring-fed San Marcos River in Fentress, Texas, Tube Excursion delivers the kind of lazy-water escape that neighborhoods and weekend calendars crave. Operated under the booking name amigosbeach, this outfitter runs relaxed 1- to 3.5-hour tube floats and multiple kayak options that let you drift through clear, 72-degree water fed by the Edwards Aquifer. The entry point sits at Fentress, a rural river town about a half-hour from San Marcos, and includes parking and shuttle pickup so your only job is to climb in, push off, and enjoy the current.

The river here is defined by karst limestone channels, submerged springs, and stretches of shallow riffles framed by native riparian trees and stands of aquatic grasses. You’ll float past limestone ledges and occasional exposed rock outcrops that host sunning turtles; great blue herons and kingfishers are common, and on quiet mornings you may spot muskrat or river otter. The steady 72°F temperature makes the San Marcos River uniquely swimmable year-round—perfect for tubing, paddling, or a cool escape in summer heat.

What sets Tube Excursion apart is the combination of minimal logistics and the Fentress culture: parking, a shuttle back to your car, the option to sip a cold drink while you float (the local policy allows cans within the Fentress stretch), and staff that keep things simple for families and groups. Choose a one-hour float when time is tight, or a 3.5-hour drift if you want more meandering and shade. Kayak excursions extend to 2.5 or 5 hours for paddlers who want a more active day on the water.

Practical notes: the operator opens daily from 10:30 a.m. to sunset, and while life vests aren’t mandatory for experienced swimmers, parents and non-swimmers should heed the recommendation that children under eight and those who can’t swim wear flotation. Bring water-resistant footwear, a dry bag for your phone, reef-safe sunscreen, and a lightweight towel. Expect easy access points and gentle current—this is a recreation float rather than a technical whitewater run.

For visitors staying in San Marcos, New Braunfels, or nearby Austin, Tube Excursion at amigosbeach offers an approachable river day that pairs well with local craft beer and barbecue. It’s a low-stress, high-sun way to experience one of Texas’s oldest spring systems—clear water, limestone character, and a pace that invites you to slow down and float. Reservations are straightforward via the provided booking link, and the operation’s flexible hourly options mean you can build a half-day float into a longer road trip itinerary; staff handle shuttle logistics so you return to your vehicle without fuss.

Pack a reusable water bottle, polarized sunglasses, and a waterproof case for valuables to keep the day painless and photo-ready and comfortable.