Cataract Canyon in Canyonlands National Park serves up 28 Grand Canyon Style rapids. It is one hundred miles of the Colorado River from Moab, Utah to Lake Powell. Tag-A-Long Expeditions offers 1 - 4 day rafting trips. And this May and June visitors will want an outfitter to lead them, as record snow melt is recorded in the Rocky Mountains.
High water on an unbridled Colorado River will be terrific and this level of rafting comes around only every ten years or so. Enjoy the solitude only Utah can provide.