Last year a few of us kayakers that worked on clear creek, took some guys from my company down. They were R2ing 10ft sotars. 2 boats. The level was above 450 and it might have been more like 5 or 6 hundred. Cant really remember but they did fine. They ran everything but supermax with no problems at all, but they were all very experienced rubber pushers. Probly need 400+. Also there was at least one other couple that did it at baileyfest. It goes. Im sure we will see more of that this year! Hopefully cause its fun to watch.