IRON VIKING - 42 KM
Fitness Level: Challenging | Average Finish Time: 6.5 Hours
- More than just a marathon: test your strength, endurance, and mental resilience.
- You have a maximum of 7.5 hours to reach the finish, with strict cut-off times.
- Take on the toughest challenge and push your personal limits.
- Runners are recognized by the green Iron Viking vest: priority at obstacles, applause, and support from fellow participants and spectators.
- Not everyone understands your motivation: some may even call you a little crazy, but we call you a LEGEND!
THE OBSTACLES
In addition to the 42 km you’ll run, over 100 obstacles await you… all within 7.5 hours! It’s the ultimate test of strength, endurance, and perseverance. Curious about the challenges that lie ahead? Below, you’ll find the most epic obstacles of Strong Viking – get ready for an unforgettable adventure!
Running an Iron Viking means burning thousands of calories and losing liters of fluids. Nutrition and hydration are therefore crucial! Along the course, you’ll find water stations and aid stations offering things like energy gels. But as an Ultra or Iron participant, you get an extra advantage: at the start/finish zone, you’re allowed to place your own bag with food and drinks. Make smart use of it!
Carb up in the days leading up to the run so you can hit the start line fully energized. Use your training to test what your stomach can handle during long efforts, don’t try anything new on race day! Tip: schedule one or more long runs to practice your nutrition strategy. That way, you’ll know exactly what works for you when it matters most.
UPCOMING IRON VIKING EVENTS
Obstacle Run
Sat 29 & Sun 30 May 2027
Hofstade

TRAINING FOR A MARATHON
During the Iron Viking of Strong Viking, you don’t have to run 42 km straight through like in a traditional marathon. Instead, you alternate between running and tackling challenging obstacles, making this run a truly unique experience. On average, it takes about 6.5 hours to complete. Want to be well-prepared for the start? Marathon training can be a solid foundation for this ultimate challenge!
USEFUL TIPS
At Strong Viking, you’re never alone, not even when preparing for the 42 km Strong Viking Run. Below, you’ll find helpful articles full of tips and tools to get you fully ready for your next challenge!
SPLASHING PHOTOS






