Tunnel Ultra: The mind-bending 200-mile ultra-marathon in the dark - BBC Sport

One runner was chased by monsters. Another went blind. In the darkness, nothing is as simple as it seems.

RaceRaves Blisters, Cramps & Heaves

Tunnel Ultra: The mind-bending 200-mile ultra-marathon in the dark

Running 50km in the Tunnel Ultra Marathon Tunnel: A taste of the

Combe Down Tunnel - Wikipedia

Bath tunnel ultra marathon a 'mind-bending' test - BBC News

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John Harris on LinkedIn: #miniject #wgc

The Tunnel Trailer - 200 Mile Ultra Marathon in a Tunnel

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The Tunnel Ultra: 55 hours of running in the dark 😵‍💫