Eiger Ultra Trail E101 is a 101km ultra marathon in Grindelwald, Switzerland. Distance: 101km. Elevation: 6,700m D+. Difficulty: brutal (Challenge Rating 64/100). DNF rate: 22%. Time limit: 26h. Surface: trail. Established 2007.
Eiger Ultra Trail E101
Grindelwald, Bern, Switzerland
"101km circling the Eiger, Mönch, and Jungfrau — running beneath the most famous North Face in alpinism."
A 101km mountain ultra circling the iconic Eiger, Mönch, and Jungfrau trio with 6700m of climbing beneath the legendary Eiger North Face.
The Course
A challenging loop from Grindelwald circling the Eiger, Mönch, and Jungfrau trio. The course traverses alpine passes, glacier views, and traditional Bernese Oberland villages. Running directly beneath the Eiger North Face — one of the most famous walls in mountaineering.
mountainous
loop
8
2,635m
5
Runner Experience
Standard aid station support with food, drinks, and basic medical assistance at regular intervals.
A legendary finish line atmosphere. Eiger Ultra Trail E101 is a bucket-list race with celebrations that match its reputation.
Race Day Weather
12°C
2° – 22°
60%
40%
Mid-summer Bernese Alps. Alpine conditions with variable weather. Cold at passes, pleasant in valleys. Glacial proximity means cool air currents.
Stats & Records
2007
500
17:30:00
9:42:15
Rémi Bonnet (2023)
12:08:33
Maude Mathys (2022)
Entry
CHF 180
November
weeks
Lore & Trivia
Eiger 101 is the ultra variant of the Eiger Ultra Trail event — a longer, more demanding course that pushes deeper into the Bernese Alps. While sharing the same dramatic Eiger backdrop, the 101km format explores more remote valleys and higher passes, attracting mountain runners who find the shorter variants too civilised. The Swiss Alps remain the gold standard for mountain ultrarunning, and the Eiger region — with its combination of technical terrain, alpine exposure, and efficient Swiss race organisation — delivers an experience that few races can match.
- ▸ 101km through the Bernese Alps beneath the Eiger.
- ▸ More remote and demanding than the shorter Eiger Ultra Trail variants.
- ▸ Swiss Alpine Club huts provide aid along the course.
- ▸ The Eiger, Mönch, and Jungfrau form the dramatic backdrop.
- ▸ Part of the growing Swiss ultra trail scene.
- ▸ Efficient Swiss race organisation is a hallmark.
- ▸ Technical alpine terrain demands experience and proper equipment.
Swiss race organisation meets Swiss mountain terrain. Everything works except your legs.
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Frequently Asked Questions
How long is Eiger Ultra Trail E101? +
Eiger Ultra Trail E101 is a 101km (101km) ultra marathon with 6,700m of elevation gain. The course is loop on trail terrain.
How hard is Eiger Ultra Trail E101? +
Eiger Ultra Trail E101 is rated brutal with a Challenge Rating of 64/100 (Demanding). The DNF rate is 22%. Runners have 26 hours to finish.
What is the weather like at Eiger Ultra Trail E101? +
Average temperature is 12°C (range 2°C to 22°C) with 60% humidity and a 40% chance of rain. Mid-summer Bernese Alps. Alpine conditions with variable weather. Cold at passes, pleasant in valleys. Glacial proximity means cool air currents.
Are crew and pacers allowed at Eiger Ultra Trail E101? +
Crew access is allowed. Pacers are not allowed. Mandatory gear is required.
What is the course record for Eiger Ultra Trail E101? +
The men's course record is 9:42:15 set by Rémi Bonnet in 2023. The women's course record is 12:08:33 set by Maude Mathys in 2022.
What is the average finish time for Eiger Ultra Trail E101? +
The average finish time is 17:30:00. About 500 runners finish each year. The DNF rate is 22%.
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