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The Secret Nuclear Bunker Estate (Kelvedon Hatch), Brentwood, Essex, United Kingdom
Nuclear Rush 6K is an adult obstacle course within the Nuclear Rush weekend held at the Secret Nuclear Bunker Estate (Kelvedon Hatch), Brentwood. The course is advertised as roughly 6 km with 40+ obstacles over muddy farmland, woodland and water features and is pitched for a wide range of fitness levels. The organiser highlights chip timing, finishers medals and free finisher photos while confirming there is no penalty for skipping obstacles so participants may choose their own pace.
The event village provides spectator-friendly facilities, changing rooms, hot washdowns and free car parking close to the course. Waves run across the weekend (Saturday and Sunday) and bookings are organised per wave on the series page. Age rules apply for adult waves (minimum age typically 13+ or as stated for specific waves) and under-16s often must be accompanied by a paying adult.
