My current thru hike plan for the Colorado Trail calls for thirty days of hiking, two zero days, one near zero, and two 14er side trips (Massive and Elbert). My planned average pace is around 17-18 miles per day but there are a couple of days in the 22-23 mile range as well. I have a firm stop date for the trip so I do not have the option of slowing down and still completing the thru hike, although I do have the option of eliminating the planned zero day in Creede if needed, and I have a slack day in Durango that could be eliminated as well.
I have just completed a 260 mile section of the Appalachian Trail (Rockfish Gap to Boiling Springs) in 13 days of hiking, which included one short day out of Harper's Ferry. Nine of the thirteen days on the trail were over 20 miles with the highest mileage day at over 29. Except for the 29 mile day (the last day), this pace was comfortable for me since I get up very early and am usually on the trail by 7am with 10-12 miles done before noon. I had seven back-to-back 20+ mile days and while I was obviously tired (and slept well), I did not feel like it was a death march or anything like that at all...
My concerns with the CT vs. this AT section are that (a) elevation will be a factor on the CT; (b) afternoon thunderstorms could halt my hiking days prematurely; (c) I am unfamiliar with the grade/trail quality of the CT vs. the AT; and (d) the CT will be twice as long as my AT segment, including the side trips I have planned, and I'm not sure how my body will hold out for a month vs. two weeks at that pace.
I really enjoy hiking, but not hanging out in camp for hours, so I very much would like to spend most daylight hours on the trail rather than in camp assuming I'm physically capable.
If anyone who has hiked both the CT and AT (or at least the AT section I just hiked) has comparative feedback on the trails, that would be very helpful in my planning process. While I cannot change my return date, I could potentially start a couple of days earlier, although that would be quite an expensive proposition for a few reasons. Thanks!