Valentines Day Fun
A Different Way To Spend The Day
Ditch the clichés and do something different this Valentine’s Day in Essex. Get outdoors with a unique Valentine’s Day experience, challenge yourselves, work together and enjoy plenty of laughs — all while switching off from everyday life and making unforgettable memories.
5K Valentines self navigational Trail Run
14th February at 10:00am
Age 7+
Approx. 1 Hour
14th February 10:00am
All abilities are welcome to join us for a self navigational trail run in support of the British Heart Foundation.
You will be given a navigation route with checkpoints around the course. Can you find them all and make it to the finish line? Wear something red to show your support!
Trail trainers recommended.
- Raise money for British Heart Foundation.
- Hot Chocolate and Jammie Dodgers at finish line.
- Hot washdowns & changing rooms available.
- 5K self navigational trail run.
(Includes Booking Fee)
Under 16 year olds must be accompanied by a paying adult
20% off activities at Nuclear Adventures
Age 18+
Approx. 1 Hour
14th & 15th February
Looking for a date that’s actually exciting? Whether you’re a duo that loves to challenge yourselves on our crossings or you just want to get outdoors and try something new together, we’re giving you the perfect excuse to book. This Valentine’s, we’re celebrating pairs by offering a 20% discount when two adults book any of our Nuclear Adventures activities together. It’s time to find out if you really make a great team!
How to get the offer
- Navigate to the Nuclear Adventures activity page
- Choose Your Activity: Select the activity you wish to take part in.
- Add tickets for the whole family
- Enter Discount Code: use code FUSION26 at checkout to receive your discount
- Limited Time: The discount is only valid for activities taking place between 14th & 15th Feb 2026
Nuclear Offers
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.