Rush Weekend - Nuclear Races

Kelvedon Hatch, United Kingdom • 9 May 2026

Nuclear Rush

Nuclear Rush is a series of muddy obstacle course races held on the Secret Nuclear Bunker Estate in Brentwood, Essex. Courses run across farmland, woodland and lakes and feature a mix of natural and man-made obstacles, water hazards and mud sections. Signature obstacles include the Deathslide, Travelator and para-plunge zip lines into water.

Available distances

  • 1.5 km - Rush Rookies (children)
  • 3 km - Rush Rookies 3K / Rush Rookies Pro
  • 4 km - Rush Family
  • 6 km - Adult Rush (40+ obstacles)
  • 12 km - Adult Rush (70+ obstacles)
  • 38 km+ - Rush Oblivion Storm (lap format)

Events provide race-day facilities such as hot washdowns, changing areas, buoyancy aids for water obstacles and a free car park. Participants receive chip timing, a finishers medal, a free finishers photo and a free bag drop for most races. Young categories specify age limits and supervision requirements; for example, the 6 km race is open to ages 13+ with adult accompaniment required for 13–15 year olds, and the 12 km race is age 16+.

The Rush Oblivion Storm is an advanced, multi-lap distance that requires completion of multiple 12 km laps for the Oblivion medal; competitive Oblivion entries are subject to additional mandatory penalty obstacles and band rules. Standard adult races allow participants to skip obstacles without penalty. Visit the organization's website for the most recent information.

Race information

38 km
Rush Oblivion Storm - 38k+
12 km
Rush - 12k
6 km
Rush - 6k
Visit the organization's website for the most recent information.
Trail runs nearby

Experience the beauty of ancient woodland at the Epping Forest Wildwood Trail Series. Choose between a 10K or half marathon distance through scenic trails featuring natural forest terrain and muddy paths.

Outrun Archway offers recurring, in-person trail runs at Whittington Park in north London. Led by queer folks, the sessions prioritize a space for all paces and typically cover about 6k on unpaved surfaces.

The inaugural Essex County Fell Championships features a new 10km course with 450m of climb. This open-entry fell race offers county prizes for qualified Essex runners. Every finisher receives a free drink.

A self navigation trail race of about 6.2 miles at Mountfitchet Castle on 19 Apr 2026, for runners aged 16 and over; entries include a £4 tea room voucher and results are published on the organiser’s website.

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