Iconoculture: In the world of endurance sports, there’s been a slow but steady escalation from marathons to ultramarathons, fun-runs to eco-challenges. Now a new race circuit has developed that seems a mashup of Iron Man athleticism and Burning Man primitivism. Billed as the world’s toughest one-day endurance race on the planet, the “Tough Mudder” series resembles nothing so much as […]