Overview
High Rocks is a mud-run-meets-obstacle-race hybrid by Tough Mudder and Hyrox. It features running outdoors with obstacles instead of gym stations. If you're choosing between them, the core question is: indoor gym racing or outdoor obstacle course?
Format Comparison
Hyrox: indoor, 8x1km + 8 functional stations, climate-controlled, standardized. High Rocks: outdoor, trail running + obstacles (monkey bars, rope climb, cargo net), weather-dependent, varies by venue. Hyrox takes 60-120 minutes. High Rocks is typically shorter at 40-75 minutes.
Difficulty
Different challenges. Hyrox is a grinding aerobic test - pure fitness capacity over 13km. High Rocks requires grip strength for obstacles, upper body pulling power, and comfort with heights/mud. Hyrox is harder cardiovascularly. High Rocks is more technical and unpredictable.
Availability
Hyrox runs in 30+ countries with 100+ annual events. High Rocks is primarily UK and expanding into Europe. If you're outside the UK, Hyrox is far more accessible. Both sell out popular locations quickly - register early.
Training Overlap
About 70% overlaps. Both need running fitness and grip strength. Hyrox-specific: sled conditioning, SkiErg/rowing technique. High Rocks-specific: pull-ups, rope climbing, balance/coordination. If you train for Hyrox, you're mostly ready for High Rocks minus the technical obstacles.
Verdict
Do Hyrox if you want precise benchmarking, indoor racing, and a year-round calendar. Do High Rocks if you want outdoor adventure, obstacle variety, and don't mind getting muddy. Many athletes race both - Hyrox in winter months, High Rocks in summer.
More Guides
What is Hyrox? The Complete Beginner's Guide
Everything you need to know about Hyrox - the indoor fitness racing competition taking over the world.
Hyrox Race Format Explained: All 8 Stations + Running
Full breakdown of the Hyrox race format - 8 running segments, 8 workout stations, and what you need to know.
Hyrox vs CrossFit: Key Differences Explained
How Hyrox compares to CrossFit - format, training, competition style, accessibility, and which is right for you.
Ready to Race?
Find a Hyrox event near you and start training with purpose.