Nuclear Fit vs Toughest: distancia, estaciones, precio y dificultad comparados (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.

Toughest is an obstacle course race series held in Sweden and Norway. The organisers report more than 220,000 runners since 2013, and the race has repeatedly been voted the best obstacle course race in Europe in runner polls.

Each event weekend offers several formats. The Main Race covers about 8 km with the full set of obstacles, and Double Distance is two laps of that course, about 16 km. Xplore is a 4 km version with the hardest obstacles removed and no timing, aimed at first-timers, and Toughest Family is a 2 km course for children and adults together. An Elite class runs the 8 km course for competitive athletes, with the Toughest Tour and OCR World Championship qualification. Courses mix grass, sand, gravel, mud and water, with signature obstacles such as the Ramp and the Holmenkollen. Current venues are Gothenburg, Malmö, Stockholm, Oslo and Sälen. Every finisher receives a medal.