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Ultra-Trail Mount Yun by UTMB Guanwangmiao Township, Shanxi, China

Name: Ultra-Trail Mount Yun by UTMB
Start: 2027-10-08
End: 2027-10-10

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Ultra-Trail Mount Yun by UTMB

Course maps

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HelloDrifter does not warrant the accuracy of this course data; it is provided for informational use only. Verify the course against the event organizer's published materials before relying on it for navigation or safety-critical activities.

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EMY 20K
MMY 50K
DMY 100K
UMY 100M

Foot race | 9 Oct 2027

29.9 mi

Distance

Elevation gain

5,289 ft

Elevation high

3,530 ft

Elevation avg

Unspecified surface

Elevation loss

2,156 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 29.9 mi, which means that the energy expenditure for the run is equivalent to running a flat 39.5 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 10 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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Ultra-Trail Mount Yun by UTMB - MMY 50K course map

Stats summary

Race distance	Distance	Ele gain	Ele loss	Ele avg	Paved	Gravel	Dirt	Narrow
EMY 20K	13.6 mi	5,653 ft	5,653 ft	3,199 ft	100%	0%	0%	0%
MMY 50K	29.9 mi	8,566 ft	8,566 ft	3,530 ft	100%	0%	0%	0%
DMY 100K	59.7 mi	15,387 ft	15,390 ft	3,950 ft	100%	0%	0%	0%
UMY 100M	102.5 mi	24,797 ft	24,800 ft	4,150 ft	100%	0%	0%	0%