Answer: triathlon

AnswerCrossword Clue
TRIATHLONLong-distance competition
TRIATHLONIronman event
TRIATHLONSummer Olympics event
TRIATHLONIron man event
TRIATHLONIronman's test
triathlonAn athletic contest consisting of three different events, typically swimming, cycling, and long-distance running
triathlona sporting contest consisting of three events held without a break between each, usually swimming, cycling and running