Mike and Jason meet up with friend and adaptive athlete Dan Kosick to take on the Grand Cayon's Rim-to-Rim-to-Rim Traverse. It's a roughly 42-mile trail run with over 11,000 feet of elevation change. 100 degree temperatures and the fact that the guys are trying to complete the double traverse in under 24 hours will push them to their limits. The Grand Canyon Rim-to-Rim-to-Rim is a classic crossing of one of the Seven Natural Wonders of the world… twice.