Participants of the annual Marine Corps Marathon (MCM) Run Amuck race walk up a hill at Marine Corps Base Quantico, Va., June 10, 2017. The Run Amuck is the MCM's messiest mud and obstacle course consisting of a four-mile trail with 21 challenges to include ammo can relay, low crawl, and a mud pit. The event also included a scaled down two-mile version of the course, the Mini Run Amuck. (U.S. Marine Corps photo by Lance Cpl. Yasmin D. Perez)

- Image ID: MT0T57

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