The Tough Mudder organization, as does the Warrior Dash, takes your shoes when you are finished with the race, if you're willing to make the donation. Tough Mudder cleans up each pair and sends them overseas to people in need, while the Warrior Dash grinds the shoes up and turns them into playground mulch. “I guess my old tired running shoes are better than nothing to someone,” said ERDC Deputy Commander Maj. Thomas Clair, a Tough Mudder 2012 and previous Warrior Dash participant.