At the dam on the res. Anything upstream of the res is jetboat domain. Have had my boat as far as the falls. Can be very dodgy with the wrong water levels. SRD has flow rates on their website, usefull! Once you get up into the canyon you run into the can openers (sharp granite rocks) not the nice round alluvial rocks like you find downstream. The penalty for error can be large. If you can read a river and have the right equipment it is an incredi
ble run with gorgeous scenery.