OCR Kings blog https://ocrkings.wordpress.com OCR Kings provide the best videos how to beat Spartan Race, Tough Mudder, marathons, ultras, and obstacle course races (OCR).
The OCR Kings in action at the 2015 Bone Frog Challenge. Almost all of the obstacles of the course are featured in this video. Direct link: https://youtu.be/DEfGmTjOv80
