Ultra Marathons in & near Denver, Colorado 2024 - 2025

The Grand Traverse

Crested Butte, Colorado

30 Mar 25 - 31 Aug 25

$213.00 - $662.50

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Runs With Scissors Races

Brighton, Colorado

26 Apr 25

$38.10 - $92.16

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Greenland Trail Races

Larkspur, Colorado

03 May 25

$39.80 - $99.20

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Weld Your Mettle Running Festival

Eaton, Colorado

23 May 25 - 25 May 25

Free - $181.20

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

Windsor, Colorado

21 Jun 25

$16.90 - $101.70

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TransRockies Run Charity Bibs

Buena Vista, Colorado

04 Aug 25 - 09 Aug 25

Free

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2025 CKF Leadville Trail 100 Run

Aspen, Colorado

16 Aug 25 - 17 Aug 25

Free

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Quad Rock 25 & 50 Mile Trail Races

Bellvue, Colorado

10 May 25

$133.50 - $160.00

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Summits Trail Runs

Granby, Colorado

14 Jun 25 - 15 Jun 25

$22.20 - $170.60

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Sheep Mountain Trail Runs

Fairplay, Colorado

02 Aug 25

$75.20 - $160.00

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Continental Divide Trail Run

Steamboat Springs, Colorado

23 Aug 25

$27.50 - $138.80

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Sangre de Cristo Trail Festival

Westcliffe, Colorado

27 Sep 25 - 28 Sep 25

$43.40 - $342.25

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Indian Creek Trail Runs

Sedalia, Colorado

18 Oct 25

$32.80 - $149.40

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BINGO! Trail Party

Byers, Colorado

08 Nov 25

$54.00 - $75.20

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