Andrew Bowen is not afraid of a challenge. The four-time ultra marathoner from Noosa, Australia will tell you it’s the mental challenge of pushing your body to the limit, which is the draw to the sport. Ultra marathon distances (anything longer than a traditional marathon length of 26.2 miles) have been gaining popularity everywhere. Working professionals LinkedIn are talking about ultras the running groups, and Web sites are popping up from enthusiasts who are not only competing in ultra marathons, but in ultra triathalons as well.