Eric from St. Louis on 4/19/2014 6:54:07 PM:
I tried (unsuccessfully) to unicycle the Katy last year. Unfortunately, one of my knees stopped my trek, but I'm looking forward to getting a single wheel back on the Katy after my spring marathon in May.
Here's a video of the unicycle ride: https://www.youtube.com/watch?v=lofTXxZdZQ4