Austinites can now Tube or Float in Austin on the Colorado River by ASHLEY GOUDEAU / KVUE News  June 17th 2013   AUSTIN, TX  -- Austinites no longer have to make the trek to the San Marcos, Comal or Guadalupe Rivers to tube or float for fun. Free-flowing water can be found in the Colorado River in Southeast Austin. It's tucked between the city's Roy Guerrero Park in the Continue Reading