Runners complete gruelling 600km ultramarathon across entire London Underground network

  • london
  • December 1, 2025
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A group of runners completed a 600km ultramarathon relay across the entire London Underground network yesterday.

The astonishing feat was undertaken by 150 young people who set out from St Paul’s in central London at 6am on Saturday morning.

The gruelling run kicked off at 6am at St Paul’s in central London on Saturday

Ben Shaw, The Arc Project

The 150 participants completed the challenge within the 18-hour time limit, with one impressive team completing the mammoth run in just over 12 hours.

The run was organised by The Arc Project, an “ultra endurance” running community that encourages young people interested in the sport to take on challenges to improve their abilities.

The ultra-fit runners completed the entire London Underground tube network

Ben Shaw, The Arc Project

The challenge represents the community’s core belief that “everyone can do extraordinary things” if they possess “the right level of self-belief and mental resilience.”

The ultramarathon is one of the four “extremely difficult” challenges the group sets out for its members each year.

All 150 participants completed the run in the 18 hour time limit

Ben Shaw, The Arc Project

After all members of the community completed the ultramarathon, the community’s co-founder, James Taker, shared his pride about the impressive challenge.

James, 25, said: “As a community, we are proud of everyone that completed this extraordinary feat.”

This is just one of four “extremely difficult” challenges the running community sets for its members each year

Ben Shaw, The Arc Project

This extraordinary test of human resilience is a sign of things to come for The Arc Project, as James shared his hopes for the community’s future next year.

He said: “As 2026 approaches, we look forward to completing more challenges that test the limits of human endurance.”

“we are proud of everyone that completed this extraordinary feat” said co-founder James Taker

Ben Shaw, The Arc Project