Wide open question!!! No pun intended! My best speed with two large dudes, a good friend of mine, loaded for a tournament has been 86.1. Solo I've been 87+ and ran out of runable water. I'm usually at 83-84 with two loaded in tournament trim, though there is more there. I was the first boat in the second flight (boat 29) on the Arkansas River leaving three forks harbors running to Robert S Kerr Reservoir. When we got to the lock we were the third boat there. We were the fourth boat out of the lock, within 1/4 mile we were leading the pack. My co-angler was astonished, beyond belief what he had just witnessed. Our fastest speed was 84.5. Keep in mind I also have dual 8' Power Pole Blades.