When is the London Duathlon taking place? LimeLight Sports Club 10 December 2021 13:20 Updated Follow The 2022 London Duathlon is taking place on Sunday 04 September 2022 subject to final permissions. Related articles What challenge options are there for the London Duathlon? I have entered the race. How / when do I find out about the race day? Are disc brakes and disc wheels allowed? What time should I arrive? Why do I need a LimeLight Sports Club account? Comments 0 comments Article is closed for comments.