Tunnel Ultra: The mind-bending 200-mile ultra-marathon in the dark - BBC Sport
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One runner was chased by monsters. Another went blind. In the darkness, nothing is as simple as it seems.
The Tunnel 200 Mile Ultra Marathon Timelapse Photos of Runners
Barefoot Running Magazine - Issue 15 (Autumn/Winter 2015) by
Tunnel vision helps as ultra runners enter dark side
Bath 200-mile ultra-marathon in railway tunnel begins
The Tunnel Ultra: 55 hours of running in the dark 😵💫
The Tunnel: a 200-mile race that leaves exhausted runners
Tunnel Ultra: Experience the sights and sounds inside the tunnel
The Tunnel 200 Mile Ultra Marathon Timelapse Photos of Runners
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Running 200miles