The Best Marathons in Colorado
Thin air and mountain scenery. Here is every marathon RaceScout tracks across Colorado, in date order, with the honest tradeoffs on each.
Sun, May 16
2027
Colfax Marathon
Denver, CO
Flat
68°F
Avg temp
~2,917
Field
3%
BQ %
Sun, Sep 27
2026
Boulder Marathon
Boulder, CO
Rolling
76°F
Avg temp
~1,998
Field
3%
BQ %
Sun, May 2
2027
Colorado Marathon
Fort Collins, CO
Net downhill
66°F
Avg temp
~1,051
Field
12%
BQ %
Jun 2027
estimated
REVEL Rockies Marathon
Denver, CO
Net downhill
73°F
Avg temp
~800
Field
—
BQ %
Sun, Sep 20
2026
Pikes Peak Marathon
Manitou Springs, CO
Hilly
65°F
Avg temp
~722
Field
—
BQ %
Jun 2027
estimated
Estes Park Marathon
Estes Park, CO
Rolling
75°F
Avg temp
~144
Field
1%
BQ %
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Deeper than just the five-borough giant.
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Flat, fast, and best run in winter.
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Desert cool and downhill canyons.
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Home of the race every qualifier chases.
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Flat rivers and a big-city fall race.
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The Midwest's quiet PR country.
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The Best Marathons in Washington
Evergreen scenery and fast tunnel courses.
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The Best Marathons in Oregon
Rain-cooled and forgiving.
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The Best Marathons in Michigan
Lakeshore flats and cool fall mornings.
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Blue Ridge climbs or Piedmont flats.
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The Best Marathons in Utah
Canyon downhills and high-desert air.
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