International Scale of River Difficulty

Grades of white water

Grade 1: Very small rough areas, might require slight maneuvering. (Skill level: very basic)

Grade 2: Some rough water, maybe some rocks, might require some maneuvering. (Skill level: basic paddling skill)

Grade 3: Whitewater, small waves, maybe a small drop, but no considerable danger. May require significant maneuvering. (Skill level: experienced paddling skills)

Grade 4: Whitewater, medium waves, maybe rocks, maybe a considerable drop, sharp maneuvers may be needed. (Skill level: whitewater experience)

Grade 5: Whitewater, large waves, large volume, possibility of large rocks and hazards, possibility of a large drop, requires precise maneuvering. (Skill level: advanced whitewater experience)

Grade 6: Class 6 rapids are considered to be so dangerous that they are effectively unnavigable on a reliably safe basis. Rafters can expect to encounter substantial whitewater, huge waves, huge rocks and hazards, and/or substantial drops that will impart severe impacts beyond the structural capacities and impact ratings of almost all rafting equipment. Traversing a Class 6 rapid has a dramatically increased likelihood of ending in serious injury or death compared to lesser classes. (Skill level: successful completion of a Class 6 rapid without serious injury or death is widely considered to be a matter of great luck or extreme skill and is considered by some as a suicidal venture)





Come Whitewater Rafting with us or be a part of the Colorado Rocky Mountains on your own All Terrain Vehicle. As a family owned and operated company, we have the personality to make your vacation memorable, exciting and fun. Mile Hi Rafting’s prices and convenient location make it an ideal destination for day trips and vacations.We offer child and group discounts, and some of the hottest deals on the river.

We pride ourselves in being flexible and will help you arrange any combination of options to create your own experience. We will customize any package. Let’s talk, we will work with you to create your dream vacation!