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Eiger Ultra Trail Grindelwald, Bern, Switzerland

Name: Eiger Ultra Trail
Start: 2023-07-15
End: 2023-07-15

This has already taken place.Click here to go to the 2027-07-14 event.

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Eiger Ultra Trail

Course maps

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Route source

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E16
E35
E51
E101

Foot race | 15 Jul 2023

21.9 mi

Distance

Elevation gain

7,671 ft

Elevation high

5,289 ft

Elevation avg

Trail/Dirt

Elevation loss

2,920 ft

Elevation low

46%

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 46% over 21.9 mi, which means that the energy expenditure for the run is equivalent to running a flat 32.0 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 22 Sep 2019

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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Stats summary

Race distance	Distance	Ele gain	Ele loss	Ele avg	Paved	Gravel	Dirt	Narrow
E16	10.3 mi	2,631 ft	2,635 ft	4,472 ft	36%	54%	9%	32%
E35	21.9 mi	8,619 ft	8,192 ft	5,289 ft	39%	33%	28%	32%
E51	31.3 mi	9,872 ft	9,872 ft	5,738 ft	48%	37%	15%	32%
E101	60.3 mi	22,753 ft	22,756 ft	5,794 ft	38%	37%	25%	34%