JimJam is the marathoner. The longest race I have done is a half marathon. I've been considering doing a marathon, but I can never stay injury-free long enough to put in the miles.
I've been big on cross training in this training block leading up to my next marathon (May 3rd). "Only" three days of running but its been HARD running and on my cross day's I don't fool around much either regardless of if I'm snowshoeing, hopping on a bike (indoors for now) or on an elliptical.