The Spiral Race is a unique 6-hour endurance track running event organised by Underground Run Club in London. Unlike a traditional race with a fixed distance or finish line, participants run laps around an athletics track for up to six hours, testing both physical stamina and mental focus. The event is designed to welcome runners of all abilities — from those aiming to push beyond ultra-distance comfort zones to those exploring a new style of challenge.

Key Details

Date: Saturday, 19 September 2026
Start Time: Around midday (start typically 12:00 PM)
Location: Parliament Hill Fields Athletics Track, London, NW3
Distance: Open — run as many laps as you can within 6 hours
Organiser: Underground Run Club (London-based running community)

Race Format

The Spiral takes place on a 400-metre athletics track, where runners complete loop after loop over a six-hour period. There is no finish line in the traditional sense — the goal is to see how far you can go in the allotted time. The race allows a flexible pace, with participants free to run, walk or mix both according to their own strategy. It’s as much a mental challenge as a physical one, with a focus on persistence, focus and self-motivation.

Who Can Enter

The event is open to runners aged 20 years or over on race day, and it welcomes all levels of experience. You don’t need to be fast to participate — the Spiral celebrates individual effort and endurance rather than competition alone.

What’s Included

• Six-hour endurance format on a certified track

• Chip timing with official results for distance covered

• Aid station on site with hydration and nutrition options

• Finisher medal and event recognition

• On-site medical support and marshal assistance

• Bag drop area and basic facilities at the track

Additional Information

• The race environment is deliberately low-key and supportive, reflecting Underground Run Club’s laid-back ethos.

• Participants can take breaks and re-join the track during the six hours.

• Entries typically open several months before the event and can sell out quickly, so early registration is advised.