Deadly Dozen London

Deadly Dozen lands at Lee Valley Athletics Centre, London

Deadly Dozen is coming to London.

Deadly Dozen London brings the UK's toughest new fitness race to Lee Valley Athletics Centre on 18 July.

Athletes take on 12 x 400m laps paired with 12 gruelling exercise stations — the Labours — testing strength, speed and grit in one continuous race.

Whether you're racing Solo, teaming up in Pairs, or building a Relay squad, Deadly Dozen London is your chance to test yourself on one of the UK's premier athletics tracks. Entries for the London race are open now.

Race it your way

Pairs and Relays can be Same-Sex or Mixed (Mixed Relay: 2x Male + 2x Female). Mixed Pairs use the Male weights; Mixed Relays use the weights specific to their sex.

Solo

1 Athlete

Just you against all twelve. The purest test of grit — set your time, chase the ranking, earn the finish.

ENTER SOLO

Pairs

2 Athletes

Tackle it shoulder to shoulder. Run all 12 Laps together and split the Labours however you like - beat the race as a team.

ENTER PAIRS

Relay

4 Athletes

Race as a team of four. Complete 1 Lap and 1 Labour, then tag in the next team member; each team member completes 3 Laps and 3 Labours.

ENTER A TEAM

Simple. Brutal. Addictive.

Woman with hair in a bun holds a weight plate outdoors, looking focused and slightly tired during the Deadly Dozen Dublin workout.

At its core, Deadly Dozen is deliberately simple.

12 × 400m Runs
12 Labours (Exercise Stations)

Twenty-four stations. One continuous race.

No technical obstacles. No gimmicks.

Just honest work repeated under fatigue.

Every athlete races the same format, creating a fair, competitive experience that’s easy to understand—but incredibly difficult to master.

Black and white photo of a shirtless older man with gray hair, looking down with a serious expression.

A woman lifting a dumbbell over her head during outdoor workout, other woman bending forward in the background, trees and cloudy sky in the distance.

A woman with long hair running outdoors during daytime, wearing a sports bra, running shorts, and a smartwatch.

A group of runners racing on an outdoor track, with a smiling female runner in the foreground making peace signs, others behind her, and flags with sponsor logos on the side.

A woman wearing sunglasses and athletic clothing is lifting dumbbells overhead during an outdoor fitness event. There are other people and flags in the background.

A race designed by athletes for everyone

Every competitor receives the full experience.

✔ Mori Medal for every finisher

✔ Free professional race photos

✔ Free race transfers

✔ Official Mori Patch

✔ Global leaderboards tracking your performance

✔ Race certificate

The Deadly Dozen breakdown

START: 400m Run

1 lap of the track
Farmers Carry

Farmers Carry
240m - KB Carry
Male 2 x 24kg/53lbs
Female 2 x 16kg/35lbs
400m Run

1 lap of the track
Deadlift

60 Reps - KB Deadlift
Male 1 x 32kg/70lbs
Female 1 x 24kg/53lbs
400m Run

1 lap of the track
Lunge

60m - DB Lunge
Male 2 x 12.5kg/30lbs
Female 2 x 7.5kg/20lbs
400m Run

1 lap of the track
Snatch

60 Reps - DB Snatch
Male 1 x 15kg/35lbs
Female 1 x 9kg/20lbs
400m Run

1 lap of the track
Burpee Broad Jump

60m Bodyweight
400m Run

1 lap of the track
Goblet Squat

60 Reps - KB Squat
Male 1 x 16kg/35lbs
Female 1 x 12kg/26lbs
400m Run

1 lap of the track
Front Carry

240m - WP Front Carry
Male 1 x 25kg/55lbs
Female 1 x 20kg/45lbs
400m Run

1 lap of the track
Push Press

60 Reps - DB Push Press
Male 2 x 12.5kg/30lbs
Female 2 x 6kg/15lbs
400m Run

1 lap of the track
Bear Crawl

120m (Bodyweight)
400m Run

1 lap of the track
Overhead Carry

180m
Male 1 x 15kg/35lbs
Female 1 x 10kg/25lbs
400m Run

1 lap of the track
Clean & Press

60 Reps - WP Clean & Press
Male 1 x 15kg/35lbs
Female 1 x 10kg/25lbs
400m Run

1 lap of the track
Devil Press

20 Reps - Dumbells
Male 2 X 10 kg/22lbs
Female 2 X 5kg/11lbs