Tough Mudder Race in California Gets Even Tougher After Illness

More than 300 California runners have become sick with an unidentified virus following a mud run.

Tough Mudder Coupon - Tough Mudder deal and reviews

Sonoma County issues health advisory for Tough Mudder participants after reports of rashes, fever - CBS San Francisco

Obstacle Course Racing: Primal Pursuits Through Mud, Barbed Wire And Burning Logs – Hartford Courant

Tough Mudder Adapts So Everyone Can Get Dirty - New Mobility

Racers Sickened After 'Tough Mudder' At Sonoma Raceway

Starting My Journey to World's Toughest Mudder with Crohn's Disease

Obstacle Course Racing: Primal Pursuits Through Mud, Barbed Wire And Burning Logs – Hartford Courant

Sonoma County Tough Mudder Event — Where Some Claimed to Smell 'Cow Manure' on Field — Sickens Hundreds

Seizures, electrocution, death: Has Tough Mudder gone too far?