More than 3,400 competitors from 47 states and 32 countries participate in the 2018 Ironman Oceanside Triathlon on Camp Pendleton, Calif., April 7, 2018. The triathlon tested the participants’ strength and endurance through the swim in the Oceanside Harbor, the 56-mile bike course through Camp Pendleton and San Onofre Bluffs State Park, and the run through Oceanside. ( Marine Corps photo by Lance Cpl. Haley McMenamin)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: bike, camp, competition, corps, ironman, marine, oceanside, onofre, pendleton, run, san, swim, triathlon