JJB from Fairmont, WV on 8/3/2013 8:56:17 AM:
Please note that I am assuming the 84 mile calculation is correct.
I know of two brothers who do the entire C&O / GAP in three days. They do this, (or used to do this), every year. It was a brotherly testosterone kinda thing. Every year the one brother griped and complained about it and paid the price physically. So why did they do it? Just to say they did. My point? Yes, you can do 84 miles in a day. My very non-judgemental question to you is why 84 miles in one day? Are you on a time restraint? Just my opinion but I don't think you will enjoy the ride. This is a rough trail and averaging 12 miles an hour over 84 miles will be hard to do. It is worse if you get caught in the rain or this has been a recent rain. Mechanical failures are also a consideration. Time of year is still another consideration.
I hope you are successful on your ride. It would be nice if you let us know how it went. Your experiences may be helpful for someone else.