Call Don at Confluence...303-433-3676
There are several, depending on where you are located. Myers pool in Westminster is great, with instruction and boats to boot!
I am sure that there are others, but this is the only one I am fully aware of near Denver.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body. But rather...To skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming... WOW !!!! What a ride!!!!!!"