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Ultra Marathons Found In Colorado

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Ultra Marathons in Colorado 2025 - 2026

The most comprehensive list of Ultra Marathons in and near Colorado in 2025 - 2026. Find your perfect race!

Race Calendar: Ultra Marathons Found In Colorado

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Summits Trail Runs

Granby, Colorado
06 Jun 26
$54.00 - $138.80
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Sheep Mountain Trail Runs

Fairplay, Colorado
01 Aug 26
$75.20 - $160.00
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Buffalo Bicycle Classic

Boulder, Colorado
07 Sep 25
$40.00 - $125.00

Red Feather Trail Jamboree

Red Feather Lakes, Colorado
26 Sep 25 - 28 Sep 25
$107.00 - $316.00

Sangre de Cristo Trail Festival

Westcliffe, Colorado
27 Sep 25 - 28 Sep 25
$75.20 - $394.75

WILD Wahatoya Runs

La Veta, Huerfano
27 Sep 25
$50.00 - $100.00

West Line Winder

Buena Vista, Colorado
27 Sep 25
$133.50 - $175.90

Estes Epic

Estes Park, Colorado
27 Sep 25 - 28 Sep 25
$102.90 - $284.80

Sawatch Ascent

Nathrop, Colorado
28 Sep 25
$175.90

Suffer Better 9th Annual Fall Trail Runs

Pine, Colorado
11 Oct 25
$27.50 - $117.60

Indian Creek Trail Runs

Sedalia, Colorado
18 Oct 25
$54.00 - $170.60

Blue Sky Trail Marathon & Half Marathon

Fort Collins, Colorado
18 Oct 25 - 19 Oct 25
$107.00 - $128.20

BINGO! Trail Party

Byers, Colorado
08 Nov 25
$54.00 - $75.20

Runs With Scissors Races

Brighton, Colorado
25 Apr 26
$38.10 - $85.80

Greenland Trail Races

Larkspur, Colorado
02 May 26
$39.80 - $99.20

Weld Your Mettle Running Festival

Eaton, Colorado
30 May 26 - 31 May 26
$16.90 - $207.70

Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing

Windsor, Colorado
20 Jun 26
$16.90 - $122.90

Race in the Clouds - Alma Dirt Festival 2026

Alma, Colorado
27 Jun 26
$32.80 - $101.70

Silverheels Trail Runs

Como, Colorado
10 Jul 26 - 11 Jul 26

Sawmill Trail Runs

Pine, Colorado
06 Dec 25
$54.00 - $128.20

Endure Trail Runs

Divide, Colorado
16 May 26
$54.00 - $128.20

Summits Trail Runs

Granby, Colorado
06 Jun 26
$54.00 - $138.80

Sheep Mountain Trail Runs

Fairplay, Colorado
01 Aug 26
$75.20 - $160.00
Showing 1-21 of 21 results