Award Winning Obstacles

Voted Best Value Event

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16th & 17th May 2020



*OCRWC Qualifiers exempt

Location: Brentwood, Essex, CM15 0LA, UK
Distance:7km or 12km
Saturday Prices:7k - £71 12K - £81 (plus 3rd party processing fees 6%)
Sunday Prices:7k - £68 12K - £78 (plus 3rd party processing fees 6%)
7k minimum age:12-16 years *must be accompanied by an adult 17+ (except OCRWC qualifiers)
12k minimum age:16 years


Choose from multi award winning 7km or 12km course distances over obstacle-loaded, muddy farmland set in the heart of the Secret Bunker Estate, Essex.

Nuclear’s well known for delivering award winning events with big, high quality achievable, man-made and natural obstacles designed to test every ability of fitness on fast-paced, flowing, punishing courses over epic varied terrain. Expect the infamous Deathslide, Para-plunge zip-lines & Swing A Ding at the lake zone plus loads & loads of other obstacles.

Join us for a party weekend vibe packed with daytime obstacle racing for all the family (Rookie kids racing included), event village live music & entertainment for all ages. Make a weekend of it. Stay over & celebrate into Saturday night at our first free mudrunner’s party with rocking live band, incredible entertainment, bar, food, luxury glamping or free camping & #nuclearfamily.

  1. The course distances are 7km & 12k. This event is NOT a lap race.
  2. All racers are chip-timed.
  3. Your wave will be made up of 7 & 12k runners. You will run together until 7k where 12k runners will split. There’ll be warning signs, arrows and a Nuclear marshal at the split to guide you.
  4. There are 90+ obstacles on the 12k, 50+ on the 7k courses.
  5. Attempt as many or as few obstacles as you like – it’s your challenge!
  6. There are no penalties.
  7. A Nuclear Rush survivor medal & finisher top plus hot cup of tea at the finish.
  8. We will start clearing the 7 & 12k Rush courses from 5pm onwards (last runner 1st).

Qualifying results are taken on an individual day basis not across the weekend.
Saturday Qualifiers: due to the multiple starts the first racer over the line may not be the first qualifier.

Bibs will be worn in all qualifying waves, obstacles are mandatory.

There will be a cut-off and bibs removed from all qualifying racers after 3 and 3/4 hours. Qualifying racers must be aware the main Rush event will be ongoing and after two & a half hours racers are more likely to experience traffic & non competitive runners.

Free Wild Forest induction with every ticket.