Nuclear Fallout

NOV
7
2026
A November muddy obstacle event in Brentwood Essex with 6 km, 12 km and 24 km plus options across farmland, woods and lakes featuring 40 to 200 plus obstacles.
Sat 7 Nov 2026
Fallout – 6k Fallout – 12k Fallout Oblivion Maxx – 2...

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Nuclear Fallout

Nuclear Fallout is a winter muddy obstacle event held in November at Nuclear Essex in Brentwood, Essex. The event runs over farmland, woodland, lakes and boggy terrain and features a mix of natural and man-made obstacles, including the signature Deathslide, the Travelator and a multi-lane zip wire into water.

Distances

  • 6 km course with 40+ obstacles
  • 12 km course made of two 6 km laps with 70+ obstacles
  • 24 km+ endurance course made of three 6 km laps with 200+ obstacles

Racers are chip timed and may tackle obstacles at their own pace; there are no penalties for skipping obstacles. Every finisher receives a medal and a free finishers photo. The event provides hot washdowns, changing facilities, buoyancy aids for water obstacles, free car parking, free bag drop and spectator access. An event village is located at the Secret Nuclear Bunker near the race site.

Participants should note that under 16 year olds must be accompanied by a paying participating adult. The course is described as varied in terrain and obstacles and is scheduled in November, offering a late season, muddy obstacle running experience on a permanent course in Essex. Visit the organization's website for the most recent information.

24 km
Fallout Oblivion Maxx – 24k+
12 km
Fallout – 12k
6 km
Fallout – 6k

Events nearby

A 15-mile trail race near Danbury on 30/08/2026 featuring 1600 ft+ of ascent, technical singletrack, locally made trophies and cash prizes including a course-record bonus.
Self navigation trail races in Felsted on 31 Aug 2026 offering approx 10 miles or 10 km; entry includes a voucher for a bacon or veggie sausage sandwich.
Three starting points converge on the Klättermusen London store for a point-to-point run across the city with 25 km, 10 km and 5 km options.
A muddy obstacle-course run in Brentwood with 5 km and 1.5 km options, achievable obstacles, finisher medals and post-race wash-downs.
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