- 500 – 1200 CFS
= Lower flows. Great for eager first timers and experienced rafters. Class III+ whitewater.
- 1200 – 1700 CFS
= Medium flows. Great for aggressive first timers and experienced rafters. Plenty of Class III & IV whitewater.
- 1700 – 4000 CFS
= Medium-high flows. Great for experienced rafters and a few aggressive first timers. Plenty of Class III & IV+whitewater.
- 4000 – 8000 CFS
= High flows. Challenging Class IV+ whitewater, exciting for experienced rafters. Big waves and swift moving water.
- Above 8000 CFS
= Extreme high flows. Fast moving water, with powerful waves and long rapids. Experience is highly recommended. Trips at these levels are best for very aggressive people who are not afraid of falling into a very fast river with long rapids.
CFS: Cubic Feet per Second