Penobscot Adventures Whitewater Rafting runs rapids in the Class III-V range. We have trips for families and friends who are looking for adventure. We match the guides, the routes taken and the size of the rafts to the whitewater being run and the crews in the boats. The difficulty of a river rapid is classified on a scale of Class I to Class VI. Class I rapids are very easy and Class VI unrunnable. Rivers are generally classified based on normal moderate water flows but during times of high or low water levels, the grade can be increased. Most commercial rafting trips, ours included, take place on a grade III – V rivers.
Class I: Moving water, small waves, clear passages. (The rafts need little or no guidance.)
Class II: Easy rapids with bigger waves, the straight forward and clear. (Waves rock the raft, but very good for self guided trips.)
Class III: Many waves in the 3-4 ft range, high, irregular; rocks; eddies; rapids with passages clear but narrow. Guides should be in every boat.
Class IV: Long rapids; big powerful waves, boiling eddies; powerful and precise maneuvering required.
Class V: Exceedingly difficult, long and violent rapids, following each other almost without interruption; riverbed extremely obstructed; big drops; violent currents; very steep gradient.
Class VI: Commercially unrunnable.