The first 5 miles contains a number of Class III rapids, followed by 3 miles of Class II whitewater. The lower or gorge run is about 12 miles long. The first eight miles contains Class II rapids. The last 4.5 miles contains a number of Class III rapids. No surprise, it is the busiest time of year.
Many people enjoy the parade of rafts, the waterfights, and getting off the river by late afternoon.
Spring Rafting Trips Highly recommended, but there are trade-offs. The weather might be delightfully warm or cool and rainy. Wetsuits can be needed. If your budget allows, run the full river from Chili Bar to Salmon Falls. Go with an outfitter that also runs trips on more difficult rivers and who can provide guides with lots of experience at higher flows.