Today we're exploring the journey of two ultra-marathon runners and what it takes to push the boundaries of the human limit.

Derek has run six Marathons, three of which were sub-3 hours, including his personal best of 2:52 which came at the Boston Marathon in 2014. He placed 1st overall in his first 50 Mile Ultra Marathon: Eagle Up Ultra. You can find Derek on Facebook here: https://www.facebook.com/derek.flint.37

Courtney is a Nurse Practitioner and Marathoner, has run two 100-mile races, finishing one in under 24 hours. She placed 1st in her age group at Eagle Up Ultra, and proceeded to complete the Javelina Jundred 100 miler: a run through the desert.  You can find Courtney on Facebook here: https://www.facebook.com/courkey.pepper