I did a little over 30 miles yesterday. It was the longest I've ever ridden and it wasn't too bad. I'm a bit stiff and my right knee is a bit sore (I've always had problems with that), but other than that it went okay. I was feeling really bad at first, but after a quick break, I felt great! There were even some rolling hills and a bit of a climb. I'm beginning to think that I can do this MS150 thing!