Maryvale High School senior David McDonough completed the Ironman race on Sunday and was one of the youngest of the 2,600 finishers.
It was McDonough’s first ever triathlon.
McDonough finished the grueling 140.6 mile course in a time of 14 hours and ten minutes.
The course consists of a 2.4-mile swim in Tempe Town Lake, a 112-mile bike ride, and a 26.2-mile run.
McDonough, who runs track and cross country for the Maryvale High School Panthers, is the first Maryvale student to complete in this event while still a senior in high school.
McDonough is also a honor/AP student and a section leader for the Maryvale High School Marching Band.