25–27 September 2026 · London
Go Flat Out
London's hybrid fitness race: 8 workout zones with a 500m run after each one, 4KM total. Solo, Elite, Doubles, Relay, NextGen and Sidekicks formats.
Doors open in
How It Works
How FLATOUT Works
FLATOUT is designed for people whose training needs a focal point. Take on 8 workout zones with a 500m run after each one, including the 8th. That adds up to 4KM of running across the course. Choose your format, set your target, and beat your time.
500m run after every zone, including the 8th
Choose Your Challenge
6 Ways to Go Flat Out
Solo or in a team, first-timer or seasoned racer, there's a format built for exactly where you are.
Start withSolo
The solo format built to test your training.
Compete inElite
The format built for those who want more from their training.
Team up withDoubles
Two people. One shared challenge.
Bring your crew inRelay
Four people. One shared challenge.
Kids raceNextGen
Where young athletes discover their strength, speed and confidence.
Youngest racersSidekicks
Train together. Compete together. Finish together.
Lock In Your Spot
Tickets
Prices rise as each wave fills. The earlier you register, the more you save.
Solo
- 8 workout zones, 500m run after each
- Ability-matched wave start
- FLATOUT finisher medal
- Event photography included
Elite
- Weighted vest throughout
- Heavier loads, faster standards
- Elite-only wave & leaderboard
- FLATOUT finisher medal
Doubles
- Two athletes, one shared course
- Split zones, share the load
- Team wave start
- 2x finisher medals
Relay
- Four teammates, two zones each
- Fast transitions, shared effort
- Built for corporates & crews
- 4x finisher medals
Racing with a young athlete? See NextGen and Sidekicks formats.
From Our Community
Racers Like You, Going Flat Out
The whole experience was electric. Good choice of activities.
The staff on each section were helpful and wanted you to succeed.
Really loved the energy. The support from all the crew at each station really helped with motivation.
The feeling of accomplishment at the end was amazing!
The encouragement of each organisation that was involved was really motivating.
I really enjoyed the unique venue, it was great!
Exciting. Challenging. Clean.
The feeling of self achievement was really something special.
The whole experience was electric. Good choice of activities.
The staff on each section were helpful and wanted you to succeed.
Really loved the energy. The support from all the crew at each station really helped with motivation.
The feeling of accomplishment at the end was amazing!
The encouragement of each organisation that was involved was really motivating.
I really enjoyed the unique venue, it was great!
Exciting. Challenging. Clean.
The feeling of self achievement was really something special.
Good To Know
Frequently Asked Questions
FLATOUT is a timed fitness event: 8 workout zones with a 500m run after each one, including the 8th. 4KM of running in total. Open to regular gym goers and first timers alike.
No. FLATOUT is designed for all, from regular gym goers to first timers.
One Doubles ticket covers the two team members. One Relay ticket covers the four team members. You can buy multiple tickets in one transaction if you’re competing in two divisions (e.g. Solo and Doubles) or purchasing for yourself and another person.
Yes, you'll just need to pay the difference.
Your Next Result Starts Here
25–27 September 2026 · Old Billingsgate Market, London. Six formats. One finish line. Go Flat Out.