Tough Mudder Race in California Gets Even Tougher After Illness Spreads

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

California Tough Mudder participants report bacterial infections

Tough Mudder Race in California Gets Even Tougher After Illness Spreads

Emails show health problems reported after 2022 Sonoma Tough Mudder but nothing was done

Health advisory issued for participants of 'Tough Mudder' race in Sonoma County – NBC Bay Area

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

California Tough Mudder participants report bacterial infections

Tough Mudder in California leaves racers with infections

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Tough Mudder in California leaves racers with infections

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

Several people fall ill with mysterious rashes, fever after Tough Mudder event - ABC News