Nuclear Fit vs Wild Hybrid: distance, stations, price & difficulty compared (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.

Wild Hybrid is a UK hybrid fitness race series that combines off-road trail running with outdoor functional workouts, held at estate and park venues. It was launched in 2024 by Daniel Flint of Wild Deer Events and Sam Marshall of CrossFit Chester le Street.

The format alternates five 1 km trail runs with five workout stations and finishes with a 5 km trail run, for about 10 km of running in total. Stations have included sandbag lunges, D-ball cleans, a sled push and pull, single-dumbbell devil's presses and wall balls, with standard and scaled weights. Athletes can race solo or in pairs, and pairs can be same-sex or mixed; pairs run side by side and alternate reps at the stations. Season 3 venues include Lambton Castle (Durham), Bramham Park (Leeds), High Lodge in Thetford Forest, Pollok Park (Glasgow), Bowness on Windermere and Druridge Bay Country Park. It suits trail runners and functional fitness athletes who prefer racing outdoors.