Most people know Tough Mudder as the obstacle-course race that challenges competitors to push their body -- and willpower -- to the limit.
It is a grueling event, and many competitors are eager to look the part, so to speak, by having their heads shaved for the race. In conjunction with Bic, Tough Mudder has shaved more than 10,000 heads the past two years to help raise money and awareness for the Wounded Warrior Project.
Here are some of the memorable shaves from Tough Mudder events:
-- For more on Tough Mudder, check out this video.
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