Rapid Ratings
- I — Easy
Small waves, clear passages
- II — Medium
Clear passages, irregular waves
- III — Difficult
Clear passages, irregular waves
- IV — Very Difficult
Powerful waves, numerous rocks, difficult passages, precise maneuvering required
- V — Extremely Difficult
Long and violent rapids in quick succession, violent currents, steep gradients
- VI — Un-runnable
Not attempted by commercial outfitters
Yampa Rafting Trips
- Rated Class III-IV May-June: IV-V
Lodore Rafting Trips
- Rated Class II-III
Desolation Rafting Trips
- Rated Class II-III
Cataract Rafting Trips
- Class III-IV May-June: IV-V
Ruby Rafting Trips
- Rated Class I-II