What's on
As well as our regular adventures, we also have a variety of special events taking place throughout the year. Take a look below at a few highlights of what we have on.
Nuclear Fit – September 2026
Fitness Race
All Abilities
Saturday 19th September
Nuclear Fit is the ultimate outdoor fitness race designed to test you physically and mentally. This fitness race combines six 1km trail runs with intense workouts and fitness stations, like sled pulls and tyre flips. Don’t like running? Nuclear Fit Storm has all of the fitness stations, with none of the running. It’s a fresh alternative for those looking for a fitness race and to get outdoors.
- Chip timing
- Trophies for 1st, 2nd and 3rd male and female winners
- Finishers Medal
- Free for spectators and free parking
Mud Tribe
Muddy Obstacle Run
All Abilities
1.5-6K
5 September 2026
We ramp up the fun on the 5km course, with even more mud, foam and laughs! Make some muddy memories for your Tribe to treasure.
Join us for a day of excitement, encouragement and lots of fun!
With achievable fun obstacles that will have you smiling and laughing all the way round.
Following it’s popularity in our inaugural 2025 event we’ll also have a female only Mud Tribe Sisters start time between 12:30pm – 1:30pm.
What’s Included
- Wide variety of obstacles – no upper body strength required!
- Go at your own pace; no chip timing.
- Hot wash downs and changing rooms at the end of the course.
- Water obstacles but no full water submersion.
Fallout
Muddy Obstacle Run
All Abilities
6K & 12K
7 November 2026
Tackle the Nuclear winter beast! Choose from our multi award winning 6K or 12K lapped course. Whether you’re a newbie, small group, big team, veteran or competitive endurance racer, Nuclear courses are thoughtfully designed to be challenging, fun and achievable for all ages and every fitness ability.
What’s Included
- 40+ obstacles
- Timing Chips
- Survivor Medals for everyone
- Water obstacles
High Ropes
Approx. 2 Hours
Activity
All Abilities
Available All Year
Ready to leave the ground behind? Our High Ropes adventure is a thrilling, sky-high experience that will test your nerves, challenge your balance, and leave you buzzing with adrenaline.
You’ll navigate suspended bridges, swinging platforms, rope crossings, and zip wires up to 8 metres above the forest floor as part of our High Ropes course.
Whether you’re conquering fears or chasing fun, every step is a chance to prove what you’re made of.
What’s Included
- 3 different levels
- 6 different courses
- 40m long Final zip wire
- Over 70 Aerial obstacles
- Adult Summer Saver valid between 20th July and 31st Aug
Splash
1 Hour
Activity
All Abilities
June / July / August
Make a splash this summer at our award-winning obstacle course, the perfect introduction to water-based obstacles.
Designed for ages 6+, Splash is all about fun, confidence and getting stuck in. From bouncing and climbing to splashing and sliding, children can explore the Lake Zone in a safe, exciting environment packed with energy and laughter.
Our epic water obstacles include Upslide-Down, Doughnuts, Mud Pits, YouTube, Magic Carpets, Splat-the-Rat and more.
With small group sessions and a dedicated instructor, it’s a relaxed and supportive way to enjoy the outdoors, build confidence and create unforgettable summer memories.
Buoyancy aids are provided for all lake activities, with experienced, water safety-trained staff on hand throughout.
Perfect for families and younger children looking for fun things to do this summer.
Key information
- Hot washdowns and changing rooms available.
- Hosted by friendly and qualified instructors.
- Private sessions available by emailing wildforest@nuclearessex.com
- Buoyancy aids provided for all lake activities.
- Change of clothes and shoes, and a black sack for wet clothes.
Secret Nuclear Bunker Tour
Allow 1 Hour
Activity
Available All Year
Take a step back in time to the Cold War era with a visit to the Kelvedon Hatch Secret Nuclear Bunker. This massive underground complex is the biggest and deepest Cold War bunker open to the public in the Southeast of England.
As a Regional Government Headquarters, the bunker would have housed hundreds of staff, including Prime Minister Margaret Thatcher. Our self guided audio bunker tour is a fascinating opportunity to explore this unique piece of history and discover the secrets that would have unfolded in the event of a nuclear war.
What’s Included
- Immersive Self guided tour with handsets
- Discover real life artefacts from the Cold War period, and experience what life would have been like at the Essex Secret Bunker.
- Discover the authentic underground command centre – where real plans were made for life after a nuclear strike.
- Younger visitors can explore this unique era of our history through our engaging dressing up area.
Explore all our activities...
Step out of the routine and into the thrill of award-winning obstacle course action at Nuclear Races.
Challenge yourself with Nuclear Fit, an outdoor fitness race that tests your strength, stamina, and determination.
Get muddy with Mud Tribe, a 5k obstacle course run which is suitable for all abilities.
Uncover Cold War secrets at the iconic Kelvedon Hatch Secret Nuclear Bunker.
Take adventure to new heights at Nuclear Adventures, featuring high ropes, zip lines and thrilling target sports.
Get outdoors and challenge yourself at Nuclear Wild Forest with thrilling obstacle courses and axe and knife throwing.
How to find us
Nuclear Essex 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.