Not that I could compete with Mike if I wanted to but we're still getting snowed on here so I've still been spinning in the gym for my bike rides. A 100 miler does sound tempting though - but there's no way I'll be doing 116 miles! - if I do a hundred miler it's going to be a hundred miles and that's it.
The one advantage to spinning in a gym that I've found is I can read a book while I ride. Yesterday, I experienced the fastest hour of spinning ever as I got into the book I was reading and barely noticed the time pass. I was able to maintain good rpms too. I'm seriously considering trying out reading while running on a treadmill - of course, I've only used a treadmill once so far and I'm not used to them - at the same time it seems like it'd be easier than reading while running around a track. Do those eliptical machines count as running? At least on those there wouldn't be any chance of getting blasted into the wall. Maybe it's time I start looking into audio books.