There's 2 people who ride it on 36" unicycles. You'll be fine. The course is mostly rolling, and the BIG BAD HILL that everyone warns about is only an 8 or 9% grade for around a half mile. For a couple years in a row, I rode from Redmond Ridge down to Wilmot Gateway and took the trail down to the U District and headed into downtown for the ride. The ride home made it a century.