River Scale of Difficulty
This scale is generally used by the whitewater rafting community to rate the difficulty level of rivers. It is intended to be a general guideline and conditions cause ratings to change.

Class 1 - Flat Water

Class 2 - Novice

Class 3 - Medium - minimum age for participants is 7 years of age

Class 4 - Advanced - minimum age for participants is 14 years of age

Class 5 - Expert - minimum age for participants is 18 years of age

Class 6 - Unrunnable

Age Groups for pricing:

Youth - under 18 years

Adult - 18 years and older

Current River Conditions:

South Fork American
 Flow

North Fork Yuba
 Flow