Looking for the ultimate obstacle course race in Essex? Then get ready for Nuclear Rush 2026, held right next door to the Kelvedon Hatch Secret Nuclear Bunker on 9–10 May 2026, for a weekend packed with mud, obstacles and unforgettable moments.
Whether you’re a first-time mud runner or a seasoned OCR athlete, Nuclear Rush is one of the UK’s most exciting obstacle races, offering iconic obstacles and a buzzing event village atmosphere.
Here are five reasons you won’t want to miss Nuclear Rush 2026.
- Take On One of the UK’s Best Obstacle Course Races
Nuclear Rush is famous for its award-winning obstacle courses, designed for fun, laughter and bonding.
You can choose your challenge:
Rush 6K – packed with 40+ obstacles
Rush 12K – featuring 70+ obstacles for those ready to go all in
From climbing cargo nets and crawling through mud to tackling famous obstacles like the Deathslide, the Travelator and Para-Plunge zip lines, every kilometre delivers adrenaline, laughter and mud in equal measure.
If you’re searching for a mud run in Essex or a UK obstacle race to try something new, this is the one.
- Perfect for Beginners, Teams and OCR Veterans
One of the best things about Nuclear Rush is that anyone, of any ability can take part. Whether you’re taking on your first obstacle race, racing with friends or colleagues or competing as a seasoned OCR athlete.
The courses are designed for all fitness levels, and there’s no penalty for skipping obstacles, meaning you can enjoy the race at your own pace.
Younger racers can also get involved with the children and family races, designed especially for younger racers and families.
- Race in the gorgeous but easily accessible Essex countryside
Few races have a location like this.
Nuclear Rush takes place right next door to the Secret Nuclear Bunker in Brentwood, Essex, with the courses running through farmland, woodland, lakes and mud-filled terrain.
This unique venue creates the perfect playground for obstacle racing, natural landscapes mixed with epic man-made challenges.
Expect muddy trails, water crossings, woodland runs and fun obstacles. In short: everything you want from a mud run.
Planning to watch instead of race? Spectators are welcome.
- The Event Village Atmosphere Is Unreal
Nuclear Rush isn’t just a race, it’s a full weekend experience.
The event village is packed with energy, music and spectators cheering racers across the finish line. Friends and family can watch the action, grab food and drinks, and soak up the festival atmosphere while racers tackle the course.
Add in chip timing, finisher medals and professional event photos, and you’ve got a race day you’ll remember long after the mud has washed off.
On the same weekend and at the same site, Nuclear Fit is also hosting the first race of their season. Why not make a full weekend of it and take on the ultimate fitness weekend with the bundle deal for racing both events?
- Ready for More? Take On the 12K and Oblivion Storm
The Rush 12K course is designed for those who want a longer run and more obstacles, pushing racers through 70+ obstacles across varied terrain.
For those looking to go even further, the weekend also features Rush Oblivion Storm, our endurance race designed for the toughest competitors. This event pushes racers through a lap of Nuclear Fit Storm before tackling multiple laps of the Nuclear Races course, combining physical stamina, strategy and mental grit to see who can last the distance.
Competitive racers can also take part in the British OCR Championship, making the Rush weekend one of the biggest highlights of the UK obstacle racing calendar.
Whether you’re chasing a podium finish or simply pushing yourself further than ever before, there’s a challenge waiting for you.
