Manuel Antonio Costa Rica Adventure - Whitewater Rafting ToursIguana Tours Whitewater Rafting Tours. Our more family-friendly Savegre River provides Class II, III and some rare IV rapids that are more than manageable. And of course you can expect that our internationally trained, bilingual guides and safety kayakers will expertly coach you through navigating either river. For more experienced rafters, the Naranjo River runs from April to December and is a consistently adrenaline-pumping Class III and IV wild ride. More information on www.iguanatours.com