Nuclear Rush
Prepare for the ultimate muddy obstacle course race at Nuclear Rush. Choose your challenge on our 6k or 12k courses; there’s over 40 obstacles on our 6k course and over 70 obstacles on the 12k course, including our famous Deathslide and para-plunge zip lines. Our exciting courses are designed to test every fitness level, whether you’re a beginner, a seasoned mud racer, an individual, Rookie or family. This event is a must-do race!
7th November 2026
Adult Races
Rush – 6K
Muddy Obstacle Run
Easy
6km
Saturday 8th & Sunday 9th May
The 6km course takes you through muddy farmland, woodlands and lakes, and is complete with approximately 40+ obstacles to test your determination, agility and adventurous spirit.
Set in the heart of the Secret Nuclear Bunker Estate in Essex, and it’s open to participants aged 13+ (adult accompaniment required for 13 – 15 year olds) and welcomes all fitness levels.
You’ll be chip‑timed and receive a finishers medal, but there’s no penalty for skipping obstacles, meaning that you can enjoy the experience and take your race at your pace.
What’s Included
- 40+ obstacles
- Hot washdowns
- Changing facilities
- Buoyancy aids available for water obstacles
- Free car park
- Finishers Medal
- Free finishers photo
- Free bag drop
- Chip timing
Rush – 12K
Muddy Obstacle Run
Intermediate
12km
Saturday 8th & Sunday 9th May
Double the distance, double the fun. Take on the full 12km course and every world-class obstacle.
Taking you deep into muddy farmland, woodland and lakes on the imposing terrain of the Secret Nuclear Bunker Estate in Essex, the 12km races offers over 70 obstacles and a more endurance feel for those ready to push their limits.
With chip‑timing, high‑quality, achievable natural and man‑made obstacles and no penalty system (you can attempt as many or as few obstacles as you like), it’s built for both seasoned racers and adventurous newcomers alike.
What’s Included
- 70+ obstacles
- Hot washdowns
- Changing facilities
- Buoyancy aids available for water obstacles
- Free car park
- Finishers Medal
- Free finishers photo
- Free bag drop
- Chip timing
Nuclear Offers
Family and Children RACES
Create unforgettable memories and embrace active adventure together with the Family and Rookie Rush. Designed for all abilities, this course offers a fun, supportive environment where the whole family can tackle exciting obstacles, get wonderfully muddy and celebrate every accomplishment. It’s the perfect way to spend quality time outdoors, empowering the next generation to embrace an active lifestyle and build self-confidence.
Rush Rookies – 1.5K
Muddy Obstacle Run
Easy
1.5km
Saturday 8th & Sunday 9th May
What’s Included
- Â 25+ obstacles
- Â Hot washdowns
- Â Children’s changing facilities
- Â Buoyancy aids available for water obstacles
- Â Free car park
- Â Finishers Medal
- Â Free downloadable certificate
- Â Free finishers photo
- Â Free bag drop
- Â Chip timing
Rush Rookies – 3K
Muddy Obstacle Run
Easy
3km
Saturday 8th & Sunday 9th May
What’s Included
- 50+ obstacles
- Â Hot washdowns
- Â Children’s changing facilities
- Â Buoyancy aids available for water obstacles
- Â Free car park
- Â Finishers Medal
- Â Free downloadable certificate
- Â Free bag drop
- Â Chip timing
- Â Free finishers photo
Rush Rookies Pro – 3K
Muddy Obstacle Run
Intermediate
3km
Saturday 8th May
What’s Included
- 50+ obstacles
- Â Hot washdowns
- Â Children’s changing facilities
- Â Buoyancy aids available for water obstacles
- Â Free car park
- Â Finishers Medal
- Â Free downloadable certificate
- Â Free bag drop
- Â Chip timing
- Â Free finishers photo
- Â Trophy for winning boy and girl
- One free supporting adult per Rookie, must arrive with the Rookie.
Rush Family – 1.5K
Muddy Obstacle Run
Easy
1.5km
Sunday 9th May
The ultimate family muddy adventure! Designed for families looking to enjoy a fun, inclusive obstacle experience together, Rush Family 1.5km covers a short and manageable distance.
The course features mud, water, and playful obstacles suitable for both children and adults. The focus is on teamwork, laughter and shared adventure rather than speed or competition, making it perfect for introducing younger participants to the thrill of obstacle racing.
All finishers receive a medal, creating a memorable experience for the whole family to celebrate together.
What’s Included
- 25+ obstacles
- Â Hot washdowns
- Â Children’s changing facilities
- Â Buoyancy aids available for water obstacles
- Â Free car park
- Â Finishers Medal
- Â Free downloadable certificate
- Â Free bag drop
- Â Chip timing
- Â Free finishers photo
- 4 – 15 year olds must be accompanied by a paying adult.
Rush Family – 4K
Muddy Obstacle Run
Intermediate
4km
Sunday 9th May
Turn the fun up a notch with the longer family course of 4km with more obstacles – the perfect way to build resilience together!
The Rush Family 4k wave is perfect for families seeking a more adventurous day out together. Covering a longer distance, it features a mix of mud, water, climbing and crawling obstacles that are still family-friendly and suitable for a range of ages and abilities, including the Deathslide.
The emphasis is on fun, teamwork and shared achievement rather than competition, allowing parents and children to tackle challenges side by side. All finishers receive a medal, creating a rewarding and memorable experience for the whole family.
What’s Included
- Â 35+ obstacles
- Â Hot washdowns
- Â Children’s changing facilities
- Â Buoyancy aids available for water obstacles
- Â Free car park
- Â Finishers Medal
- Â Free downloadable certificate
- Â Free bag drop
- Â Chip timing
- Â Free finishers photo
- 10 – 15 year olds must be accompanied by a paying adult.
Award winning
Award‑winning obstacles on a permanent course, in a farmland setting including mud, woods, rivers and lakes.
Signature obstacles
Iconic signature obstacles, including the 20‑foot Deathslide, Travelator and a 15‑lane zip‑wire into water.
Races for all
A range of races which are inclusive of all fitness levels, abilities and ages.
Group and team friendly
Perfect for groups and teams to participate together and also offers the perfect opportunity for raising money for charity.
Event village
Friends or family can watch the race, enjoy music, food, drinks and merch in our spectator friendly event village while the action happens nearby.
Varied courses
Varied distances and formats including beginner friendly options.
TOP 10 FAQ's
How to find us
Nuclear Races 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.