Nuclear Races Rush Weekend

The Nuclear Rush weekend, taking place on Saturday, May 9 and Sunday, May 10, 2026, is the flagship obstacle course racing (OCR) event hosted by Nuclear Races in Brentwood, Essex. Known as the UK’s most award-winning muddy obstacle course, the event is held on permanent farmland terrain featuring a mix of woods, rivers, lakes, and "decent quality mud." The courses are famous for their high obstacle density—featuring over 70 obstacles on the 12K route—including signature challenges like the 20-foot Deathslide, the Travelator, and a 15-lane zip-wire into water.

Brentwood is a suburban town and borough in Essex, England, with a population of approximately 77,000 residents. Located within the London commuter belt, it offers a blend of historic rural character and modern accessibility. The demographic profile of Brentwood is approximately 89% White, 4% Asian, 2% Black, and 3% Mixed race. The area is one of the more affluent parts of Essex, with a median household income significantly higher than the regional average, roughly £52,000 GBP. The race venue is strategically positioned just 15 minutes from the M25 and A12, making it a major hub for the UK OCR community.

The event is designed to be highly spectator-friendly, featuring an "Event Village" where friends and family can enjoy music, food, and drinks while watching participants tackle nearby obstacles. Amenities at the site are comprehensive, including smooth parking, robust changing tents, a bag drop, and warm washdown showers for post-race cleanup. For the competitive waves, the race is supported by British Obstacle Sports, requiring athletes to complete mandatory obstacles to qualify for the championship rankings. Whether participating as a "Rookie" on the 1.5km course or taking on the grueling 38km "Oblivion Storm," the weekend is defined by its motto, #LoveMud, and a strong emphasis on community support from on-course marshals.