The The Spiral 2025 is a one-of-a-kind endurance track event in London, hosted by the Underground Run Club. Over six transformative hours, participants are challenged to push beyond their limits on a 400 m track—lap after lap, with no distractions, no changing scenery, and no finish line.

Key Details

• Date & Time – Saturday, 18 October 2025 — race runs from 12:00 PM noon for a continuous 6 hours

• Location – Parliament Hill Fields Athletics Track, London (NW3 2JP), an eight-lane, floodlit all-weather track

• Event Type – Endurance track race — 6-hour duration with no fixed distance

• Organiser – Underground Run Club, offering unconventional, small-scale running experiences in London

Race Description

This is a raw, introspective endurance challenge. Runners (or walkers) circle the same 400 m track for up to six hours—no scenery changes, no laps markers, just you, the track, and your mind. Participants control their pace, taking rest or breaking as desired. The format is welcoming regardless of pacing or experience; it’s as much a test of mental strength as of physical endurance

What’s Included

• Race entry with finisher’s medal and a polaroid photo memento

• Full support with chip timing, aid station stocked with water, coke, energy gels, fruit, and snacks, as well as medical support and bag drop

• Event permitted by the UK’s governing body (ARC Permit)

Additional Information

• Minimum Age: Participants must be at least 20 years old on race day

• Entry Fee: £49 for general entries, £47 for club members and UKA/ARC-affiliated runners

• Supporters: Spectators and crew are welcome but must stay off the track and aid station areas; pacers are not allowed

• Entry Deadline: Open until sold out or Thursday, 18 September 2025, whichever comes first; transfers allowed up to one month before the event, subject to a fee; no refunds or deferrals

Take the Challenge
Are you ready to test your endurance, mind and body, on a never-ending looped track? The The Spiral 2025, on Saturday, 18 October, invites you to run, walk, or simply explore how far you can push yourself in a crowd-free endurance setting. Sign up now to secure your place in this unique six-hour track adventure.