Yes, it is important to stay hydrated while whitewater rafting on the American River! We recommend you bring your own water while rafting. Typically during the summer on the American River, the weather can be very hot. You can place your reusable or recyclable water bottle on the bottom of the raft and it will keep cool with the river water (no need for a cooler for your drinks as they have a tendency to bang into shins and other body parts) – make sure the cap is tight as you do not want to drink a mix a river water, and lip balm. Some companies provide a cooler at the end of the trip and fill it with lots of sodas, Capri sun drinks, and water bottles to quench your thirst and continue to keep you hydrated after a fun day on the river.
For other ideas, you can read What to bring in a raft?
I hope that this helps, as always if you have questions about this information, or have other questions about river trips, please feel free to E-Mail me, I am always here to help no matter what or where your river adventure is taking you.
Hope to see you on the river this year,
Flash (over 30 years of river rafting experience around the world and back)