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Kaçkar by UTMB Ayder, Rize, Türkiye

Name: Kaçkar by UTMB
Start: 2027-09-11
End: 2027-09-11

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Kaçkar by UTMB

Course maps

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AYDER 4K
KAÇKAR 20K
KAÇKAR 50K
KAÇKAR 100K

Foot race | 11 Sep 2027

50.7 mi

Distance

Elevation gain

10,584 ft

Elevation high

7,641 ft

Elevation avg

Mixed

Elevation loss

3,914 ft

Elevation low

41%

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 41% over 50.7 mi, which means that the energy expenditure for the run is equivalent to running a flat 71.5 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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Stats summary

Race distance	Distance	Ele gain	Ele loss	Ele avg	Paved	Gravel	Dirt	Narrow
AYDER 4K	2.4 mi	794 ft	827 ft	4,478 ft	87%	13%	0%	13%
KAÇKAR 20K	12.6 mi	4,915 ft	4,911 ft	6,414 ft	52%	48%	0%	3%
KAÇKAR 50K	27.5 mi	10,108 ft	10,118 ft	6,929 ft	65%	35%	0%	26%
KAÇKAR 100K	50.7 mi	19,075 ft	19,068 ft	7,641 ft	64%	35%	2%	18%