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.