I did the 100 kilometer/62 mile TdC here three weeks ago, and found it a lot easier than I thought it would be. Which is why I think I could do 100 miles. If I stick relatively close to home here in the 'burbs, I have hundreds of miles of paved paths/trails, and convenient rest/refueling areas. If I can't do it and pack up and head home at mile X, no big deal, I can try again, and again, as many times as necessary. I'm not sure I like the concept of organized rides with a group or club - maybe because I got into this as therapy, mental and physical, and I view it as solitary time to work things out. Once in a while like TdC is ok, but on a regular basis, not so sure. My feelings may change on that one. I would enjoy the social aspect of a club/group, but I have too much on my plate right now, struggle to keep a full time job and deal with other things in my life. Eventually. I have faith that next year will be better than this one -2013 is certainly better than 2012 for me, cardiology not withstanding.