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Kessel Run Ultra Fruita, Colorado, United States

Name: Kessel Run Ultra
Start: 2026-11-07
End: 2026-11-07

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Kessel Run Ultra

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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10 Mile
20 Mile
50K
40 Mile
50 Miler

Foot race | 7 Nov 2026

32.4 mi

Distance

Elevation gain

5,535 ft

Elevation high

5,217 ft

Elevation avg

Trail/Dirt

Elevation loss

5,026 ft

Elevation low

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 8% over 32.4 mi, which means that the energy expenditure for the run is equivalent to running a flat 35.1 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 29 Sep 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
10 Mile	10.1 mi	1,119 ft	1,122 ft	5,177 ft	6%	92%	1%	92%
20 Mile	20.1 mi	2,080 ft	2,080 ft	5,223 ft	3%	96%	1%	96%
50K	32.4 mi	3,507 ft	3,504 ft	5,217 ft	5%	92%	3%	92%
40 Mile	40.3 mi	4,160 ft	4,160 ft	5,223 ft	3%	96%	1%	96%
50 Miler	50.4 mi	5,279 ft	5,282 ft	5,213 ft	4%	95%	1%	95%