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Eiger Ultra Trail by UTMB Grindelwald, Bern, Switzerland

Name: Eiger Ultra Trail by UTMB
Start: 2027-07-14
End: 2027-07-17

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Eiger Ultra Trail by UTMB

Course maps

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E16
E35
E51
E101
E250

Foot race | 17 Jul 2027

32.6 mi

Distance

Elevation gain

8,743 ft

Elevation high

5,774 ft

Elevation avg

Mixed

Elevation loss

2,927 ft

Elevation low

32%

Climb factor

What is climb factor?

The climb factor for a course is the percentage of your energy used in hill-climbing compared to the energy expended running the flats.

This course has a climb factor of 32% over 32.6 mi, which means that the energy expenditure for the run is equivalent to running a flat 43.1 mi.

Climb factor is provided courtesy of Ben Crowell, who both authored climb factor's scientific paper and wrote the open source software for it. You can read more about it here .

Course last updated 9 Oct 2026

All values approximate

Distance & elevation data

The distance or elevation data not precisely what you expect for this route?

Data from a GPS device can be rough, especially in areas where the terrain (trees, canyons) interfere with GPS signals. And routes drawn on our maps are reliant on people marking trails from satellite images -- the details of which can be hidden by trees.

Elevation can be tricky too. Elevation data is stored on spaced topographical lines, and determining the elevation of a point requires computers to estimate based on how close the point is to the topographical line.

We mitigate this by calculating distance in 3-D (think Pythagorean theorem) and using mathematical techiniques to smooth the elevation data. We come close, but no one can be perfect with imperfect data, even in 2026.

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Eiger Ultra Trail by UTMB - E51 course map

Stats summary

Race distance	Distance	Ele gain	Ele loss	Ele avg	Paved	Gravel	Dirt	Narrow
E16	10.6 mi	2,913 ft	2,920 ft	4,498 ft	33%	40%	27%	27%
E35	22.6 mi	8,241 ft	7,815 ft	5,338 ft	35%	37%	28%	35%
E51	32.6 mi	9,308 ft	9,314 ft	5,774 ft	46%	38%	16%	33%
E101	62.1 mi	21,171 ft	21,184 ft	5,833 ft	38%	36%	25%	34%
E250	163.7 mi	52,776 ft	52,756 ft	5,177 ft	29%	51%	20%	46%