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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

🚀Boosted

West Line Winder

Buena Vista, Colorado
Sat 26 Sep 26
$112.30 - $154.70
🚀Boosted

Endure Trail Runs

Divide, Colorado
Sat 16 May 26
$64.60 - $128.20
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The Grand Traverse

Crested Butte, Colorado
Sun 29 Mar 26 - Sun 06 Sep 26
$218.30 - $683.50

NoCo Urban Ultra & Relay

Bellvue, Colorado
Sat 11 Apr 26 - Sun 12 Apr 26
$107.00 - $191.80

Runs With Scissors Races

Brighton, Colorado
Sat 25 Apr 26
$38.10 - $96.40

Greenland Trail Races

Larkspur, Colorado
Sat 02 May 26
$39.80 - $99.20

Quad Rock 25 & 50 Mile Trail Races

Bellvue, Colorado
Sat 09 May 26
$133.50 - $165.30

Endure Trail Runs

Divide, Colorado
Sat 16 May 26
$64.60 - $128.20

Weld Your Mettle Running Festival

Eaton, Colorado
Sat 30 May 26 - Sun 31 May 26
$48.70 - $218.30

Summits Trail Runs

Granby, Colorado
Sat 06 Jun 26
$64.60 - $138.80

Race in the Clouds - Alma Dirt Festival 2026

Alma, Colorado
Thu 25 Jun 26
Free - $101.70

Blue Sky Ascent & Round Trip (formerly the Mt. Evans Ascent)

Idaho Springs, Colorado
Sun 28 Jun 26
$133.50 - $144.10

Silverheels Trail Runs

Como, Colorado
Fri 10 Jul 26 - Sat 11 Jul 26
$54.00 - $368.50

High Lonesome 100

Nathrop, Colorado
Fri 17 Jul 26 - Sat 18 Jul 26
$489.25

Never Summer 100km & 60km

Walden, Colorado
Fri 24 Jul 26 - Sun 26 Jul 26
$186.50 - $389.50

Sheep Mountain Trail Runs

Fairplay, Colorado
Sat 01 Aug 26
$75.20 - $160.00

Red Feather Trail Jamboree

Red Feather Lakes, Colorado
Fri 25 Sep 26 - Sun 27 Sep 26
$96.40 - $295.00

Sangre de Cristo Trail Festival

Westcliffe, Colorado
Sat 26 Sep 26 - Sun 27 Sep 26
$43.40 - $342.25

Indian Creek Trail Runs

Sedalia, Colorado
Sat 17 Oct 26
$32.80 - $149.40

Blue Sky Trail Marathon & Half Marathon

Fort Collins, Colorado
Sat 17 Oct 26 - Sun 18 Oct 26
$96.40 - $117.60

Sawmill Trail Runs

Pine, Colorado
Sat 05 Dec 26

Audi Power of Four Trail Run

Aspen, Colorado
Sat 18 Jul 26
$112.30 - $133.50

West Line Winder

Buena Vista, Colorado
Sat 26 Sep 26
$112.30 - $154.70

Sawatch Ascent

Nathrop, Colorado
Sun 27 Sep 26
$137.74
Showing 1-22 of 22 results

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