This is more about marathon running and spiritual enlightenment. I have always been fascinated by the Marathon Monks.
Here is a book by John Stevens called "The Marathon Monks of Mt Hiei"
The Spiritual Athlete's Path to Enlightenment by Holly A. Schmid 12/11/96.
U-Tube Channel 4 Marathon Monks of Mt Hiei
I am an avid walker and hiker. My favorite is a long hike. I also enjoy taking off and going on a meandering walk for a few hours. I've hiked rim to rim in the Grand Canyon and I did 3 Burning Boot Walks on Vancouver Island.