ATHX vs Terrain Race : distance, stations, prix et difficulté comparés (2026-27)

ATHX is a UK-born hybrid fitness competition, co-founded by coach Ollie Marchon, that now runs events across the UK, Europe and the United States. Each ATHX event is a continuous 2.5-hour session across six zones. Every competitor completes the same three workouts: a Strength zone (20 minutes), an Endurance zone (30 minutes) and a MetCon X zone (30 minutes). These are separated by a warm-up zone, a refuel zone and a recovery zone. The workouts and movement standards are published for each season.

Athletes enter as singles or pairs, in an ATHX or a harder ATHX PRO category, and pairs can be same-sex or mixed. Season results lead to the ATHX Finals, held in Lisbon in 2026. The fixed rest periods and clear divisions make ATHX accessible to first-timers, while the strength element suits athletes who lift as well as run and row.

Terrain Race is an obstacle and mud 5K produced by EventLab, a US company that also runs fun-run brands such as Bubble Run, Muddy Dash and Blacklight Run. The current event is Terrain Race Irvine, held at Oak Canyon Park in the Silverado area of Orange County, California.

The course is about 3 miles (5 km) of rugged terrain with climbs, crawls, walls, ropes, monkey bars and mud pits. Participants pick a start time and run in waves with friends; a VIP package adds a priority wave start and extra merchandise. Packet pickup is offered the day before the race. The format is aimed at recreational runners, groups and first-time obstacle racers looking for a muddy, single-distance event rather than an elite competition.