The sunwapta river is the only grade 3 whitewater offered in jasper national park the river is glacial fed and is great for first time rafters if you are looking to paddle hard get soaked and have a lot of fun the river trip itself begins with a float where crews can practice their paddling technique before the show begins once the rapids star t they just build and build until the whopper soaks everyone just before the take out all trips are in 6 person guided rafts and all the necessary eq