Secret Nuclear Bunker Tour

Discover a great value day out in Essex to the...

Splash

Cool down this summer in our Lake Zone, packed with...

High Ropes

Take on a high ropes adventure at our challenging course...

Fallout

Tackle the Nuclear winter beast! Choose from our multi award...

Mud Tribe

Gather your tribe! Join the fun at Mud Tribe, a...

Nuclear Fit Rookies

An exciting outdoor fitness race designed for young athletes aged 9–15, giving them the chance to take on a fun and challenging course built just for them. Combining functional fitness stations with short runs, the race introduces the next generation to fitness racing in an energetic, supportive and confidence-building environment.

Fit – Rookies (9-11)

Fitness Race

Easy

1.1K

9
- 11
July 18, 2026

Designed as an introduction to fitness racing, this age category focuses on building confidence, coordination and love for exercise.

Lighter weights and shorter distances than the adult race ensure a fun and achievable challenge for younger racers.

They will undertake three 260m trail runs, and six workout stations, all designed to balance performance, safety and fun.

Please note: the child’s age on race day determines their category, not the age during ticket booking.

What’s Included

  • Chip timing
  • 1 free finishers wall photo
  • Finishers medal
  • Free spectators and free parking
£
July 18th July 2026
£50 Per Person
Current Price: £35.00
(Prices include booking fee)

Fit – Rookies (12-15)

Fitness Race

Easy

1.1K

12
- 15
July 18, 2026

A step up in intensity, this category is designed for older racers ready for more of a challenge and strengthen the foundations for a healthy lifestyle.

With heavier weights and longer distances than the younger age group, it’s ideal for those looking to push themselves and build on their fitness.

They will undertake three 380m trail runs, and six workout stations, all designed to balance performance, safety and fun.

Please note: the child’s age on race day determines their category, not the age during ticket booking.

What’s Included

  • Chip timing
  • 1 free finishers wall photo
  • Finishers medal
  • Free spectators and free parking
£
July 18th July 2026
£50 Per Person
Current Price: £35.00
(Prices include booking fee)

Nuclear Offers

NEXT EVENT

18TH July 2026

Days
Hours
Minutes
Next event detail arriving soon
Fit Stations

WHEEL TYRE FLIP

Distance age 9-11: 20m
Distance age 12-15: 30m
Height of tyre: 2ft

The competitor starts behind the line.  To flip the tyre they need to get into a deep squat, place hands under the tyre, maintain a flat back with their head up and power up through the legs and hips. They can use their knee to assist with the flip.  They can stop to rest. They complete this workout once the competitor and the whole tyre have crossed the line.

FARMER URN HUG

Distance: 80m
Weight age 9-11: 8kg
Weight age 12-15: 12kg

The competitor has to pick the urn up from the station, remembering to keep their core engaged.  The carry begins when they cross the start line.  The urn must be kept close to their chest and they can put it down at any time.  The carry is complete once the competitor and the urn cross the finish line.

PLOUGH PULL

Distance age 9-11: 65m
Distance age 12-15: 125m
Weight: 25kg

The competitor places the reins over their shoulders and they must stand behind the line prior to starting. They must remain standing at all times, hands and knees are not allowed to touch the ground.  They move the plough (sled) by pulling and moving forward.  They can stop to rest.  The pull finishes once the competitor and the plough cross the finish line.

MILK CHURN CARRY

Distance age 9-11: 70m
Distance age 12-15: 115m
Weight age 9-11: 6kg
Weight age 12-15: 12kg

The competitor has to carry one milk churn in each hand with both arms fully extended.  The carry begins when they cross the start line.  They can put the milk churns down to rest.  The carry is complete once the competitor and the milk churns cross the finish line.

DUCK AND THROW

Distance age 9-11: 50m
Distance age 12-15: 100m
Weight: 10kg
Throws age 9-11: 5
Throws age 12-15: 10

The competitor picks up a bag and runs 40m to the functional fitness station.  They will then be required to throw it over the bar without any assistance, they then duck under the bar and pick up the bag and move forward into the next designated lane.  There are 10 throws in total.  They can stop to rest. The competitor picks up their bag to run 40m back towards the finish line. The workout is complete once they cross the finish line.

Squat and Lift

Reps age 9-11: 25
Reps age 12-15: 40

The competitors start by sitting down on the box provided and picking up the handles. The lift begins when they stand up and raise the rack above their head, locking their arms out, this counts as one rep.  They must then sit back down onto the box. They can rest at any time standing or sitting. Each correctly completed rep will be counted by an adjudicator. The lift finishes when the competitor completes all the reps.

Features
icon-fit-features-bg
Group-482

Functional fitness format

Participants take on unique functional fitness stations, such as tyre flips, plough pulls and milk churn carries. They are designed to test both endurance and strength.

icon-fit-features-bg
Group-487

Training available

For those that want a little more practice before the big day, training sessions are available throughout the year to get you race day ready.

icon-fit-features-bg
Group-484

Timing Chips

Every competitor will receive chip-timing information, with breakdowns for each run and workout station, giving detailed performance splits and clear insight into strengths, progress and pacing.

icon-fit-features-bg
Group-483

Team and league opportunities

With Individual, Doubles and Relay options available, you can take part either individually or as part of a team. Individuals also have the opportunity to compete for Nuclear Fit League glory!

icon-fit-features-bg
Group-485

A premium experience

Expect smooth organisation, first-class marshals, medals, photos, all part of the premium race-day experience courtesy of the award-winning team behind Nuclear Essex.

icon-fit-features-bg
Group-481

Festival vibes

Expect a lively central arena surrounded by music, crowds, sports massage stations, a variety of stalls, free on-site parking and free spectator access, all of which creates a buzzing energy and a festival-style vibe that celebrates fitness and fun.

TOP 10 FAQ's

Can I buy gift vouchers for friends and family?
Yes — gift vouchers are available to buy online and make the perfect present for adventure lovers.
Can I wear fancy dress or costumes?
We love seeing participants racing in fancy dress and costumes! Just keep in mind that you’ll be climbing obstacles and tackling muddy, wet ditches, so choose an outfit that can handle the challenge.
How can I raise money for a charity?
Sign up to one of our races, create your own bespoke event, or design a Wild Forest mud run — then share your fundraising page with your community.
Do you charge a parking fee?
Parking is free at all sites and events, apart from Nuclear Mud Tribe, which has a £5 parking fee per car. All parking is within a short walking distance.
Nuclear20Fit20200725-0583-scaled-e1762964755992 FBJ_2673-scaled-e1762962962424 IMG_0113-2-scaled-e1762957986267 IMG_0151-2-scaled SSP_0203-scaled-e1762951877232 SSP_0789-scaled-e1762949193435 SSP_1231-scaled-e1762949599964 SSP_0509-scaled-e1762876175693 SSP_1330-scaled-e1763551073835 Awards-Photo-Option-11-scaled SSP_0279-scaled SSP_9959-scaled SSP_0078-scaled-e1765289940384 SSP_1298-scaled-e1762950732214

How to find us

Nuclear Fit is located in Brentwood, Essex just 15 minutes from the A12, M25 and M11.

By Train and taxi, we’re just 15 minutes from Brentwood station (on the mainline from Liverpool St) or 15 minutes from Epping Underground station.

By Train and taxi, we’re just 15 minutes from Brentwood station (on the mainline from Liverpool St) or 15 minutes from Epping Underground station.