I am in training with Fort Bend Fit to walk the Houston Half Marathon in January 2008. So far have walked eight miles as the longest distance several times. We get up at dark-o-clock on Saturday morning to do our long walks. As in any other specialized sport, you need your technical clothing, your hydration systems, your fancy shoes (worth it--I have Pearl Izumi and wear them everyday). I got them at Fleet Feet Sports in Rice Village.
I will try to post a few times about this training.
Later and God Bless,