Calling all challenge and adventure enthusiasts!

Nuclear Races in Kelvedon Hatch, Brentwood, is an exhilarating experience conquering thrilling obstacles while supporting local people facing life-limiting illness and bereavement.

This multi-award winning 6k and 12km course distance is set over obstacle-loaded, muddy farmland set in the heart of the Secret Bunker Estate, Essex.

Nuclear is well known for delivering award-winning events with big, high quality, achievable, natural and man-made obstacles designed to test every ability of fitness on fast-paced courses over epic varied terrain. Expect the infamous deathslides, para-plunge zip lines and new swing-a-ding obstacles at the lake zone plus loads of other obstacles. 

• Course distances are 6km & 12km. This event is NOT a lap race.

• All racers are chip-timed.

• Your wave will be made up of 6 & 12k runners. You will run together until 6k where 12k runners will split. There will be warning signs, arrows and a Nuclear marshal at the split to guide you.

• There are 70+ obstacles on the 12k, 40+ on the 6k courses.

• Attempt as many or as few obstacles as you like – it’s your challenge!

• There are no penalties.

• A Nuclear Rush survivor medal & finisher top plus hot cup of tea at the finish.

• Option to de-select finisher top at checkout, reducing our impact on the environment & reducing your final checkout total.

• We will start clearing the 6 & 12k Rush courses from 5pm onwards (last runner 1st).