13.1 miles...I can totally do that.

MOST MAJOR HALF MARATHONS ARE FOR RUNNERS--but walkers can do them too.
One advantage of a half marathon over a full marathon is that you won't
need to spend as much time on the course. Most reasonably fit
individuals should be able to walk 13.1 miles in around four hours.
Doing so is fun. It is also exciting to set goals and achieve them. But
before starting to train for a race that long, assess your fitness
level. Realistically: can you do it? The following 12-week walking
program assumes you currently have the ability to walk for 30 minutes,
three to four times a week. If that seems difficult, consider going a
shorter distance--or take more time to develop an endurance base. And
if you are over age 35, you probably should see your doctor for a
physical examination. But assuming no major problems, most healthy
people can train themselves to walk and finish a half marathon.

The secret is consistency. Make walking a regular habit--a daily habit,
not just something you do on the weekends or when the weather is nice.
Mark Fenton states: "The fitness walker must make a positive commitment
to exercise a certain number of days a week over a specific distance or
length of time, even if some of those days show fairly modest efforts."
Fenton is a former competitive racewalker and member of the US National
Team.

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I am going to sign up for this- I have 14 weeks to prepare myself...I can totally do this.