Share If you can run a mile, then one day in the future, you will be able to run two. The same can be said for when you finish a 5k race, the signs all point towards you doubling that number a few months down the line. After this stage comes the milestones of any runner – the captivating high of finishing a half marathon, a high which can only be emulated upon the completion of a full one. When the time comes for you to finish your very first 26.2 miler, you’ll feel it both emotionally and physically. What about after that though. Who is the final boss you must defeat to take the crown in your running quest? Their name is ultramarathon and they are, quite frankly kind of a big deal.