For those of you who are unsure, a 5K is 3.1 miles. A half marathon is 13.1 miles. And a marathon is 26.2 miles. So yes, you can walk a 5K! In fact, many people choose to walk runDisney 5Ks as their first race. And there's no shame in that! Walking is a great way to get started with running, and it's also a great way to enjoy the race without having to push yourself too hard.