Jenkins competed at the second Olympic triathlon at the 2004 Summer Olympics. He was the last man to finish, because of a collision during the cycling leg that left his bicycle unusable. Rather than quit, he ran the two remaining kilometers with the bike on his shoulders to place forty-fifth of the fifty who started. His time was 2:05:33.60.
- "Marc Jenkins - Olympic Record". British olympic Association.
- Davies, Gareth A (7 August 2008). "Beijing Olympics: Team GB's triathlon contenders". London: The Telegraph. Retrieved 12 May 2010.
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