There are a lot of reasons why someone would choose to run a half marathon (13.1 miles, 21.1 kilometres, or 69,225 feet). Some want to take their running fitness to a new level. Some do it in preparation for a full marathon. Others are looking for space to spend time alone. For me, I signed up because I needed a reason to take a break from my overwhelming work schedule … and participate in a once in a lifetime experience.