Check out who runners voted the Best Marathon in each State. READ MORE...

Marathon Pace Bands

Run the Right Pace in Your Next Marathon

Nearly 500 marathon courses.
Ships same or Next Day

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

Decide which marathon is best for you by using our comprehensive Colorado Marathons Calendar.

Quickly view the course Elevation Profile and Race Details.
Create free course-specific marathon Pace Bands or buy waterproof, snap-on Pace Bands for your race.
Compare the details of marathons side-by-side.
View the PR Score and Course Scores of over 500 marathons to determine which gives you the best chance to PR or qualify for Boston.

Want to narrow down your marathon search? Use the Advanced Search Tools to find your perfect marathon by Location, State/Province, or by Keywords.

Featured Races

Date	Race
September 27, 2026	Boulderthon: Boulder Marathon Boulder, CO World-Class Marathon Experience Finishing in the Heart of Boulder.
October 10, 2026	Hayden Lake Marathon Hayden, Idaho Enjoy a unique & challenging course around Hayden Lake in Idaho
October 11, 2026	Spokane Marathon Spokane, Washington Unique & scenic course running on city streets & the Centennial Trail
May 24, 2026	Coeur d’Alene Marathon Coeur d’Alene, Idaho Participate in stunning Coeur d’Alene, ID for a BQ race
May 17, 2026	Windermere Marathon Spokane, Washington Enjoy a point to point Marathon course along the Centennial Trail in Spokane, WA.

Colorado Marathons	Course	PR Score	Finishers	BQ%	Reviews	Compare
Run Through Time Marathon Salida, CO 03/13/2027	Very Hilly 182 Finishers	Course is Not Certified	182 Finishers	Course is Not Certified	Reviews	Compare Races
Run with Scissors Marathon Brighton, CO 04/25/2026	Rolling Hills 18 Finishers	Course is Not Certified	18 Finishers	Course is Not Certified	Reviews	Compare Races
Colorado Marathon Fort Collins, CO 05/02/2027	Downhill 1,162 Finishers		1,162 Finishers		Reviews	Compare Races
Colfax Marathon Denver, CO 05/17/2026	Rolling Hills 2,276 Finishers		2,276 Finishers		Reviews	Compare Races
Steamboat Marathon Steamboat Springs, CO 06/07/2026	Downhill 302 Finishers		302 Finishers		Reviews	Compare Races
Estes Park Marathon Estes Park, CO 06/21/2026	Downhill 144 Finishers	Course is Not Certified	144 Finishers	Course is Not Certified	Reviews	Compare Races
Leadville Trail Marathon Leadville, CO 06/27/2026	Very Hilly 709 Finishers	Course is Not Certified	709 Finishers	Course is Not Certified	Reviews	Compare Races
Aspen Valley Marathon Basalt, CO 07/25/2026	Downhill 222 Finishers		222 Finishers		Reviews	Compare Races
Bound for Boston (Denver) Marathon Denver, CO 08/02/2026	Mostly Flat 8 Finishers		8 Finishers		Reviews	Compare Races
Boulder Rez Marathon Boulder, CO 08/15/2026	Rolling Hills 94 Finishers		94 Finishers		Reviews	Compare Races
Staunton Rocks! Marathon Pine, CO 08/22/2026	Very Hilly 93 Finishers	Course is Not Certified	93 Finishers	Course is Not Certified	Reviews	Compare Races
Pikes Peak Marathon Manitou Springs, CO 09/20/2026	Very Hilly 722 Finishers	Course is Not Certified	722 Finishers	Course is Not Certified	Reviews	Compare Races
Fall Equinox Marathon Fort Collins, CO 09/20/2026	Hilly 95 Finishers		95 Finishers		Reviews	Compare Races
Boulderthon - Boulder Marathon Boulder, CO 09/27/2026	Hilly 1,998 Finishers		1,998 Finishers		Reviews	Compare Races
Colorado Springs Marathon Colorado Springs, CO 10/03/2026	Hilly 431 Finishers	Course is Not Certified	431 Finishers	Course is Not Certified	Reviews	Compare Races
Windsor Marathon Windsor, CO 10/04/2026	Hilly 53 Finishers	Course is Not Certified	53 Finishers	Course is Not Certified	Reviews	Compare Races
Breckenridge Road Marathon Breckenridge, CO 10/10/2026	Hilly 78 Finishers	Course is Not Certified	78 Finishers	Course is Not Certified	Reviews	Compare Races
Long View Marathon Loveland, CO 10/10/2026	Rolling Hills 157 Finishers		157 Finishers		Reviews	Compare Races
Blue Sky Marathon Fort Collins, CO 10/18/2026	Hilly 143 Finishers	Course is Not Certified	143 Finishers	Course is Not Certified	Reviews	Compare Races
Rim Rock Marathon Fruita, CO 11/01/2026	Very Hilly 101 Finishers	Course is Not Certified	101 Finishers	Course is Not Certified	Reviews	Compare Races
Want to run your best Marathon? Don't waste months of training only to run the wrong pace. Pace Bands are adjusted for the specific terrain of the course, your goal time and pacing strategies.

Marathon Pace Bands

Run the Right Pace in Your Next Marathon

Nearly 500 marathon courses.Ships same or Next Day

Best Boston Marathon Qualifiers

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

2026 IS HERE!

Colorado Marathons

Decide which marathon is best for you by using our comprehensive Colorado Marathons Calendar.

Run Through Time Marathon

Salida, CO 03/13/2027

Very Hilly

182 Finishers

---PR Score

Course isNot Certified

182 Finishers

Course isNot Certified

Reviews

Compare Races

Run with Scissors Marathon

Brighton, CO 04/25/2026

Rolling Hills

18 Finishers

---PR Score

Course isNot Certified

18 Finishers

Course isNot Certified

Reviews

Compare Races

Colorado Marathon

Fort Collins, CO 05/02/2027

Downhill

Elevation Chart

1,162 Finishers

98.77PR Score

6.3%

Qualified

1,162 Finishers

6.3%

Qualified

Reviews

Compare Races

Colfax Marathon

Denver, CO 05/17/2026

Rolling Hills

Elevation Chart

2,276 Finishers

92.77PR Score

3.6%

Qualified

2,276 Finishers

3.6%

Qualified

Reviews

Compare Races

Steamboat Marathon

Steamboat Springs, CO 06/07/2026

Downhill

Elevation Chart

302 Finishers

95.36PR Score

5.0%

Qualified

302 Finishers

5.0%

Qualified

Reviews

Compare Races

Estes Park Marathon

Estes Park, CO 06/21/2026

Downhill

144 Finishers

---PR Score

Course isNot Certified

144 Finishers

Course isNot Certified

Reviews

Compare Races

Leadville Trail Marathon

Leadville, CO 06/27/2026

Very Hilly

Nearly 500 marathon courses.
Ships same or Next Day

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

Salida, CO
03/13/2027

Course is
Not Certified

Course is
Not Certified

Brighton, CO
04/25/2026

Course is
Not Certified

Course is
Not Certified

Fort Collins, CO
05/02/2027

Denver, CO
05/17/2026

Steamboat Springs, CO
06/07/2026

Estes Park, CO
06/21/2026

Course is
Not Certified

Course is
Not Certified

Leadville, CO
06/27/2026

Course is
Not Certified

Course is
Not Certified

Basalt, CO
07/25/2026

Denver, CO
08/02/2026

Boulder, CO
08/15/2026

Pine, CO
08/22/2026

Course is
Not Certified

Course is
Not Certified

Manitou Springs, CO
09/20/2026

Course is
Not Certified

Course is
Not Certified