Nuclear Fit vs True Grit : distance, stations, prix et difficulté comparés (2026-27)

Nuclear Fit is an outdoor hybrid fitness race run by Nuclear Races at its obstacle course site near Brentwood, Essex. Instead of an indoor track, athletes run six 1 km trail loops, each including two 4 ft hurdles, and complete a fitness station after each loop in a central arena called The Core.

The stations use farm-themed equipment: a tyre flip, a farmers urn hug, a plough pull, a milk churn carry, a sandbag duck-and-throw and a squat-and-lift, with separate loads for men and women. Categories include singles, doubles and mixed doubles, plus a three-person relay in which each member completes two runs and two stations, and a Pro wave with longer station distances. Waves start every 10 minutes, chip timing records each run and station split, and there is a 2-hour time limit. It suits runners and gym-goers who want a hybrid race on trails rather than indoors.

True Grit is an Australian-owned obstacle course race created by members of the Australian special forces and designed for everyday Australians. Events have been held in New South Wales, Queensland, Victoria, South Australia and Western Australia; upcoming races include Melbourne (Wildwood) and Sydney (Lower Portland).

The main courses are Half Grit, about 5 km, and Full Grit, about 10 km, with military-inspired obstacles that involve running, crawling and climbing through mud and water. The brand has also run 15 km and 30 km events and a 24-hour enduro in NSW. Minimum ages are 12 for Half Grit and 16 for Full Grit. Runners can enter solo, including a dedicated wave for solo entrants, or as gym and group teams, with a group discount for teams of ten or more. The organisers say it suits racers of all ages and fitness levels, with the 10 km course being the tougher test.