Bernina Ultraks takes place on Fri, Jul 2, 2027 in Pontresina, Switzerland. The main route is 42.2 km.
- Date
- Fri, Jul 2, 2027
- Start
- Pontresina 🇨🇭
- Distance
- 42.2 km
- Climbing
- 2,600 m
- Level
- Open to all
The Bernina Ultraks features challenging trail running courses through the high alpine glacier scenery of the Engadin, including the flagship Bernina Glaciers Marathon over 42.2 km.
Official event pageWhat this race demands
The Bernina Ultraks 42.2 km trail marathon demands sustained climbing and descending capacity across 2,600 meters of high alpine elevation change in Switzerland.
Climbing volume
Navigating 2,600 meters of vertical gain over a marathon distance requires significant lower-body strength and efficient pacing on extended ascents.
Descent durability
The high alpine profile demands robust eccentric leg conditioning to handle the pounding of prolonged downhills without excessive muscle damage.
High altitude management
Operating in high alpine glacier scenery requires careful aerobic regulation and management of sustained cardiovascular output.
Target 60 to 90 grams of carbohydrates per hour to sustain energy levels across an expected duration exceeding four hours.
Estimated finish times
Estimates by level, not promises. Your own number depends on your fitness on the day.
Your road to race day
Race day at Bernina Ultraks is 45 weeks away. This is how a coach divides that time. The first phase starts now.
01Base33 weeks · Aug 22, 2026 – Apr 9, 2027
Aerobic foundation: mostly steady endurance work that grows the aerobic engine and the durability the later phases stand on.
02Build6 weeks · Apr 10, 2027 – May 21, 2027
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
03Peak3 weeks · May 22, 2027 – Jun 11, 2027
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
04Taper2 weeks · Jun 12, 2027 – Jun 25, 2027
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
05Race week1 week · Jun 26, 2027 – Jul 2, 2027
Openers, rest and logistics. The work is done; the job now is arriving fresh.
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