Spend a day on a Colorado river... River trips bring both families and friends together plus provide you one of the best ways to escape. Colorado offers some of the most exciting whitewater rafting vacations in the world. Arkansas River - The most popular whitewater river in America. If you only have a day or just a few hours, we have an adventure for you. Colorado whitewater rafting is legendary and world-class! The Arkansas River has put Colorado on the map as a world-class rafting destination. The state of Colorado created the Arkansas Headwaters Recreation Area, a Colorado State Park, to regulate and preserve this recreational opportunity. More people raft the Arkansas River each year than any other river in North America. The Arkansas River is centrally located in Colorado so it is just a short drive from any Colorado Destination.