Find Obstacle Course Races and Mud Runs at Muddy Race. Since 2011 we have been getting muddy and now have 250 events on our calendar. Find your next running event with us, build your profile and claim your result. Every obstacle race is on our site from Tough Mudder to Spartan Race to urban obstacle races such as Men's Health Survival of the Fittest. Join our community on Facebook to meet other muddy members.