This is a must-do on your Texas bucket list of things to do. What's better than floating the ultimate lazy river (with some easy rapids) Alongside the renowned Frio River in Texas - if you want to stay in Texas, there are so many other great places to float a River, including the Brazos River, Comal River, Guadalupe River, Medina River, San Marcos River, South Llano River. Check out our guide to all the places you can go river tubing and all the things you need to know before you plan your trip.