We were in Durango, CO this weekend to cheer on a friend riding the Iron Horse Bicycle Classic. Saturday is the big citizens ride and race from Durango to Silverton (50 miles over two 10,000' + passes -- Coal Bank and Molas) or the Quarter Horse option = 25 miles up to Purgatory Ski Area, now known (lamely, in my opinion) as Durango Mountain Resort. We saw a guy rocking a
hand cycle trike. Sunday morning we were downtown watching the crits and saw the same guy racing the crits and I suspect he has paralysis relatively high up on his spine, since he was in close to a prone position on the trike. He set a good pace. This particular crit was 30 minutes + 5 laps.
We weren't riding, but next year there is a good possibility we will be riding at least the Quarter Horse. Although you don't go over the big passes in the first 25 miles, there is enough climbing at a steep enough grade to qualify it as a suffer fest of sorts.