After an intense year of highly structured, goal-driven training, the summer of 2025 revolved entirely around one major challenge for Daan de Beer: finishing the full Ironman Klagenfurt. Sixteen days later, he was back on the start line, this time at Challenge Roth. Both races were completed successfully, but it was precisely after crossing these long-awaited finish lines that an unexpected shift followed. Daan consciously made the switch to trail running.
“I was completely done with the asphalt.”
From Ironman Structure to Physical Overload
The preparation for Ironman Klagenfurt consisted of months of training hours on asphalt, in the pool, and on the bike. Multiple marathons were part of the build-up, and nearly every session was guided by target pace, wattage, or heart rate. Both Ironman and Challenge Roth were impressive experiences, but they also demanded a lot from the body. Daan also noticed that he no longer looked around him during training. He started trail running initially as a way to recover calmly from his races. “I consciously switched to trail running to let go of pace targets and enjoy the nature around me,” says Daan.
Why Trails Made the Difference
What motivates Daan most about trail running is that nature sets the pace. Steep climbs, technical descents, and constantly changing terrain make every session different. Trail running stays fun and varied because the environment naturally slows you down or pushes you forward.
First Ultra Experience: ASICS SaintéLyon
At the end of November, Daan lined up for his first ultra-trail: the ASICS SaintéLyon in France. This is a night race run largely on unpaved roads, using a headlamp. In the dark, surrounded by silence, the race was defined by ankle-deep mud, sharp stones, and slippery descents. The combination of night running and varied terrain made this a unique first ultra-trail experience.
Nutrition as a Constant Factor
Whether on asphalt or on trails, a sharp nutrition plan remains essential. The evening before and the morning of a race, Daan focuses on carb loading: a high carbohydrate intake to fully replenish energy stores.
General guideline: 8-12 grams of carbohydrates per kilogram of body weight per day for 24-48 hours
In the start corral, Daan often chooses a Cola Caffeine Drink Gel. This is his favorite Amacx product. “Just like a real glass of cola,” says Daan. During the race, he sticks to a simple and consistent structure: fueling every 20–30 minutes, alternating between a Drink Gel and an Energy Fruit Chew.
At aid stations, Daan also regularly takes salty crackers or pretzels for variety and extra sodium intake. And in races where he’s aiming for a specific time, the final two gels are always Caffeine Drink Gels. They work perfectly for that last extra boost.
Why Amacx Fits Trail Running
“I’m a huge fan of Amacx products because the gels are actually thin enough to drink and have a pleasant consistency. I always carry Energy Nougat Bars and Energy Fruit Chews in my trail pack for variety. The flavors are really good and not overpowering, which means I don’t experience ‘flavor fatigue’ like I do with other brands. That’s a crucial factor for me, especially during long training sessions or races.”
In Conclusion
Trail running has become a valuable addition for Daan. It brings balance, enhances body awareness, and serves as a reminder that performance starts with enjoyment. Sometimes progress isn’t about training harder, but about daring to slow down. Several exciting goals are already on the calendar for the coming year, including the Seville Marathon, the Gran Fondo La Marmotte, and the SGRAIL100 trail triathlon in Girona.
A tip from Daan if you’re just starting with trail running:
“Let go of a target time and let the terrain and nature guide you. Speed will follow naturally. Listen to your body and don’t forget to enjoy it.”
