Bear in mind that a river’s level of challenge changes greatly with fluctuations in water level. The ratings in this website are based on the average flows we normally run. The water level during your trip may be higher or lower depending on climatic conditions. 

Class I. VERY EASY. Moving water with a few riffles and small waves. Few or no obstructions. 

Class II. EASY. Easy rapids with waves up to 3 feet, and wide, clear channels that are obvious without scouting. Some maneuvering required. 

Class III. MEDIUM. Rapids with numerous standing and breaking waves. Narrow but clear passages that require complex maneuvering. Some rocks, eddies, reversals, and log jams. 

Class IV. DIFFICULT. Long difficult rapids with constricted passages that require precise maneuvering in very turbulent waters. Powerful waves among rocks and boiling eddies. Scouting from shore sometimes necessary. 

Class V. EXTREMELY DIFFICULT. Big drops and violent rapids which nearly always must be scouted from shore. Riverbed is extremely obstructed and steep with very powerful waves, currents and reversals. 

Class VI. UNRUNNABLE, IMPASSIBLE, DEADLY. These rapids are always portaged.

This Home Page link is provided as a 'back-up' in case you have only downloaded an individual page.

Colberg Whitewater Expeditions is a proud sponsor of Northshore Charter School Science Olympiad.
Visit the team's website at www.scienceolympiad.com.

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