|Class Rating||Difficulty||Minimum Age/Weight||Length of Trip||River Segment|
|Class I-II: Float trip on moving water with some obstacles like waves and/or rocks that are can be easily avoided. Anyone five years old + fifty pounds can go.||Beginners||Five year olds (+ 50 pounds) and older.||1 hour to 1 day||Powerhouse Section|
|Class III: Plenty of waves, big and small; exposed rocks; and rapids with clear yet sometimes narrow routes that require maneuverability in order to negotiate.||Beginners||10 year olds and older.||½ day to 1 day||Lower Kern, Class III|
|Class IV: Longer rapids with bigger drops and more obstacles. Narrower routes that require precise maneuvering and power in order to negotiate.||Beginner to Intermediate||10 years old and older.
12 years old or older.
|Half, one, and two day trips||Lower Kern, Class IV;
|Class V: Most difficult whitewater that can be run. Rapids are long and may have many parts. Drops are more frequent and powerful. Often only one viable route that requires strength, precision, and skillful boat maneuvering in order to negotiate successfully. All guests have previous whitewater paddling experience and pass pre-trip swim test.||Advanced
|14 years old or older;
16 years old or older
|One day trips;
two and three day trips
|Upper Kern, Thunder Run; Forks of the Kern|