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Best Boston Marathon Qualifiers for 2026

Best Boston Marathon Qualifiers

It's here! Our annual list of the year's
best marathons to help you qualify for the Boston Marathon.

2026 IS HERE!



Colorado Marathons

Colorado has 21 active marathons this year. Races are most common in October, June, and August. Course terrain for these courses is most often rolling hills or very hilly. Typical race day temperatures range from 32°F to 72°F.

Popular races include the Colfax Marathon, Boulderthon - Boulder Marathon, and Colorado Marathon. There is 1 new marathon in Colorado this year — Durango Marathon. 9 certified courses can be great Boston qualifier options. Races with the best Boston qualifying percentages include the Aspen Valley Marathon — 10.4% BQ and Long View Marathon — 7.0% BQ.

Browse by metro or city:


Colorado Marathons asc  Course desc PR Score asc desc Finishers asc desc BQ% asc Reviews Compare

Run Through Time Marathon

Salida, CO
03/13/2027

Very Hilly

Very Hilly

Finishers

182 Finishers


PR Score

Course is
Not Certified

 		Finishers

182 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Run with Scissors Marathon

Brighton, CO
04/25/2026

Rolling Hills

Rolling Hills

Finishers

18 Finishers


PR Score

Course is
Not Certified

 		Finishers

18 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Colorado Marathon

Fort Collins, CO
05/02/2027

Downhill

Downhill

Finishers

1,162 Finishers


PR Score

Finishers

1,162 Finishers

 Race Reviews

Reviews

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Colfax Marathon

Denver, CO
05/16/2027

Rolling Hills

Rolling Hills

Finishers

2,917 Finishers


PR Score

Finishers

2,917 Finishers

 Race Reviews

Reviews

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Steamboat Marathon

Steamboat Springs, CO
06/07/2026

Downhill

Downhill

Finishers

344 Finishers


PR Score

Finishers

344 Finishers

 Race Reviews

Reviews

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Estes Park Marathon

Estes Park, CO
06/21/2026

Downhill

Downhill

Finishers

144 Finishers


PR Score

Course is
Not Certified

 		Finishers

144 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Leadville Trail Marathon

Leadville, CO
06/27/2026

Very Hilly

Very Hilly

Finishers

709 Finishers


PR Score

Course is
Not Certified

 		Finishers

709 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Aspen Valley Marathon

Basalt, CO
07/25/2026

Downhill

Downhill

Finishers

222 Finishers


PR Score

Finishers

222 Finishers

 Race Reviews

Reviews

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Bound for Boston (Denver) Marathon

Denver, CO
08/02/2026

Mostly Flat

Mostly Flat

Finishers

8 Finishers


PR Score

Finishers

8 Finishers

 Race Reviews

Reviews

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Boulder Rez Marathon

Boulder, CO
08/15/2026

Rolling Hills

Rolling Hills

Finishers

94 Finishers


PR Score

Finishers

94 Finishers

 Race Reviews

Reviews

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Staunton Rocks! Marathon

Pine, CO
08/22/2026

Very Hilly

Very Hilly

Finishers

93 Finishers


PR Score

Course is
Not Certified

 		Finishers

93 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Fall Equinox Marathon

Fort Collins, CO
09/20/2026

Hilly

Hilly

Finishers

95 Finishers


PR Score

Finishers

95 Finishers

 Race Reviews

Reviews

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Pikes Peak Marathon

Manitou Springs, CO
09/20/2026

Very Hilly

Very Hilly

Finishers

722 Finishers


PR Score

Course is
Not Certified

 		Finishers

722 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Boulderthon - Boulder Marathon

Boulderthon - Boulder Marathon

Boulder, CO
09/27/2026

Rolling Hills

Rolling Hills

Finishers

1,998 Finishers


PR Score

Finishers

1,998 Finishers

 Race Reviews

Reviews

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Colorado Springs Marathon

Colorado Springs, CO
10/03/2026

Hilly

Hilly

Finishers

431 Finishers


PR Score

Course is
Not Certified

 		Finishers

431 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Windsor Marathon

Windsor, CO
10/04/2026

Hilly

Hilly

Finishers

53 Finishers


PR Score

Course is
Not Certified

 		Finishers

53 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Breckenridge Road Marathon

Breckenridge, CO
10/10/2026

Hilly

Hilly

Finishers

78 Finishers


PR Score

Course is
Not Certified

 		Finishers

78 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Long View Marathon

Loveland, CO
10/10/2026

Rolling Hills

Rolling Hills

Finishers

157 Finishers


PR Score

Finishers

157 Finishers

 Race Reviews

Reviews

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Durango Marathon

Durango, CO
10/11/2026

Rolling Hills

Rolling Hills

New


PR Score

Course is
Not Certified

 		New

Course is
Not Certified

 Race Reviews

Reviews

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Blue Sky Marathon

Fort Collins, CO
10/18/2026

Hilly

Hilly

Finishers

143 Finishers


PR Score

Course is
Not Certified

 		Finishers

143 Finishers

Course is
Not Certified

 Race Reviews

Reviews

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Rim Rock Marathon

Fruita, CO
11/01/2026

Very Hilly

Very Hilly

Finishers

101 Finishers


PR Score

Course is
Not Certified

 		Finishers

101 Finishers

Course is
Not Certified

 Race Reviews

Reviews

 Compare Races
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