Mark from Columbia, MO on 8/9/2010 1:59:39 PM:
I think four or five days for the average rider to do the whole trail. Two of us rode the entire trail in June when the weather was so beastly hot. Our ages are 49 and 69. We did it in five days, but thought four days would have been a little bit better. Much depends on your transportation to and from each end of the trail, along with where you plan to stop each night. Get yourself a copy of the Katy Trail Guidebook as it is a wealth of information concerning services at each small town.