Best of Tough MudderWith no podiums, winners or clocks to race against, Tough Mudder's 10-12 mile mud and obstacle course tests your physical strength, stamina and mental grit. Author:SI StaffPublish date:Jun 13, 2016Best of Tough MudderJohn Minchillo/APMichael Nagle/Bloomberg via Getty ImagesBruce Bennett/Getty ImagesMichael Nagle/Bloomberg via Getty ImagesBruce Bennett/Getty ImagesQuinn Rooney/Getty ImagesShirlaine Forrest/Getty ImagesQuinn Rooney/Getty ImagesShirlaine Forrest/Getty ImagesShirlaine Forrest/Getty ImagesJens Meyer/APBruce Bennett/Getty ImagesQuinn Rooney/Getty ImagesZuma Press/Icon SportswireShirlaine Forrest/Getty ImagesMichael Nagle/Bloomberg via Getty ImagesBruce Bennett/Getty ImagesRyan Pierse/Getty ImagesShirlaine Forrest/Getty ImagesQuinn Rooney/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesRyan Pierse/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesShirlaine Forrest/Getty ImagesMike Lawrie/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesMike Lawrie/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesStan Grossfeld/The Boston Globe via Getty ImagesBruce Bennett/Getty ImagesJeff J Mitchell/Getty ImagesMichael Nagle/Bloomberg via Getty ImagesRyan Pierse/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesJeff J Mitchell/Getty ImagesBruce Bennett/Getty ImagesRyan Pierse/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesMike Lawrie/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesBruce Bennett/Getty ImagesTony Ding/Icon SportswireBruce Bennett/Getty ImagesJens Meyer/APBruce Bennett/Getty ImagesQuinn Rooney/Getty ImagesRyan Pierse/Getty ImagesBruce Bennett/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesJustin Setterfield/Getty ImagesZuma Press/Icon SportswireZuma Press/Icon SportswireJeff J Mitchell/Getty ImagesStan Grossfeld/The Boston Globe via Getty ImagesStan Grossfeld/The Boston Globe via Getty ImagesStan Grossfeld/The Boston Globe via Getty ImagesJens Meyer/APJens Meyer/APJens Meyer/APJustin Setterfield/Getty ImagesJustin Setterfield/Getty ImagesJustin Setterfield/Getty ImagesJustin Tallis/AFP/Getty ImagesJustin Setterfield/Getty ImagesJustin Setterfield/Getty ImagesJustin Setterfield/Getty ImagesTolga Akmen/Anadolu Agency/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesGabe Souza/Portland Press Herald via Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesQuinn Rooney/Getty ImagesGabe Souza/Portland Press Herald via Getty ImagesGabe Souza/Portland Press Herald via Getty ImagesQuinn Rooney/Getty ImagesGabe Souza/Portland Press Herald via Getty ImagesDerek Davis/Portland Press Herald via Getty ImagesRyan Pierse/Getty ImagesDerek Davis/Portland Press Herald via Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesRyan Pierse/Getty ImagesLatest NewsAfter Facing Death, the NYC Marathon Has New MeaningRunners Take on Training, Motherhood and More, Side by SideAngela Manuel Davis Is Putting a New Spin on Living With PurposeHow Fitness Trainer Ashley Joi Learned to Find Joy Through MovementSports Illustrated's Fittest 50 2022