Individual rapids are called classes, while sections are called grades. This rating system is a reference to general guide of rivers and is not intended for people who does not have paddling experience. Do not try boating these rivers without experience or an experienced guide. Class I Easy rapids, riffles and small, regular waves.
Passages are clear, easy to find, and require only elementary maneuvering to enter.
Obstacles are easily seen and avoided. Sharp bends are simple to negotiate. Suitable for novices in all boats. Obstacles may require some maneuvering. And there may be some holes and a few obstructions in the main channel.