GORUCK Events vs Nuclear Fit: distancia, estaciones, precio y dificultad comparados (2026-27)

GORUCK is an American rucking company that makes rucksacks and training gear and runs team endurance events across the United States. Its flagship event, the GORUCK Challenge, has been held since 2010; the company says it has led more than 10,000 of them.

A Challenge is a team event, not a race. Participants carry a weighted rucksack and stay together as a class from start to finish, completing team-building tasks and covering miles under the direction of a GORUCK Cadre, drawing on Special Forces traditions. Challenges come in four levels: Light, Basic, Tough and Heavy, with the longer and harder levels aimed at well-trained participants. Finishers receive a patch that is not sold. GORUCK also runs the City Ruck Series of group rucks, timed ruck events such as 5K and 15K, and event weekends that combine several formats, such as Halloween in Salem and Ruckapalooza in Jacksonville Beach. Rucksack training beforehand is recommended.

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.