Running races in or near Boulder, CO
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Boulder, CO area. Races listed here include both walking and running events of various distances — from 1-milers, to 5Ks, to marathons, and everything else in between.
Running-5K - Team of 3
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 25-8AM START AND FINISH AT ...
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Running-5K - Team of 5
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 25-8AM START AND FINISH AT ...
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Running-5K - Team of 4
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 25-8AM START AND FINISH AT ...
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Running-5K - Individual Age group/open
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 25-8AM START AND FINISH AT ...
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Running-5K - Couples / Team of 2
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 25-8AM START AND FINISH AT ...
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Running-5K - 15 And Under Youth
Organization: Turner Middle School
Date of Race: 05-03-2025
Description: All participants are welcome. Come challenge yourself to be the best.
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Trail Race Training Series- Aug 18-Sept 10
Organization: Evergreen Park & Recreation District
Date of Race: 08-18-2025
Description: DescriptionJoin Coach Jay Steinberg for weekly training sessions to prepare for ...
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Trail Race Training Series- May 26-June 18
Organization: Evergreen Park & Recreation District
Date of Race: 05-26-2025
Description: DescriptionJoin Coach Jay Steinberg for weekly training sessions to prepare for ...
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Colorado Cross Country Summer Camp
Organization: Colorado Track & Cross Country Camps
Date of Race: 07-07-2025
Description: Nestled 5,430 feet above sea level, Boulder, Colorado is renowned as ...
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Trail Race Training Series- June 23-July 9
Organization: Evergreen Park & Recreation District
Date of Race: 06-23-2025
Description: DescriptionJoin Coach Jay Steinberg for weekly training sessions to prepare for ...
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Price
Organization: Colorado Track & Cross Country Camps
Date of Race: 07-07-2025
Description: DescriptionJoin Coach Jay Steinberg for weekly training sessions to prepare for ...
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Bergen Peak Half Marathon Trail Race- Sept 13
Organization: Evergreen Park & Recreation District
Date of Race: 09-13-2025
Description: DescriptionBergen Peak runners will experience the rolling hills of Elk Meadow ...
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Muddy Dash - VIP Registration 💎
Organization: Viral Run
Date of Race: 05-10-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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13th Annual Buffs4Life 5k Walk/Run
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 25-8AM START AND FINISH AT ...
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Bubble Run - Exclusive VIP Registration- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ ...
Organization: Viral Run
Date of Race: 06-21-2025
Description: If you’ve done a traditional 5K, you know ...
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Trail Race Training Series- July 13-July 30
Organization: Evergreen Park & Recreation District
Date of Race: 07-14-2025
Description: DescriptionJoin Coach Jay Steinberg for weekly training sessions to prepare for ...
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Elk Meadow 10k Trail Race- June 21
Organization: Evergreen Park & Recreation District
Date of Race: 06-21-2025
Description: DescriptionThis 10K race leads runners throughout the rolling hills of Elk ...
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Running-5K - 16 and Older Adult Registration
Organization: Turner Middle School
Date of Race: 05-03-2025
Description: All participants are welcome. Come challenge yourself to be the best.
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Bubble Run - Value Registrations- R̶e̶g̶u̶l̶a̶r̶ P̶r̶i̶c̶e̶ $̶5̶4̶.̶9̶5̶
Organization: Viral Run
Date of Race: 06-21-2025
Description: If you’ve done a traditional 5K, you know ...
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Muddy Dash - Value Registration
Organization: Viral Run
Date of Race: 05-10-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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Bubble Run | Denver
Organization: Viral Run
Date of Race: 06-21-2025
Description: If you’ve done a traditional 5K, you know ...
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Muddy Dash | Denver
Organization: Viral Run
Date of Race: 05-10-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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21st Annual Bob Turner Classic 5k Run/Walk
Organization: Turner Middle School
Date of Race: 05-03-2025
Description: All participants are welcome. Come challenge yourself to be the best.
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5k Race June
Organization: Fort Lupton Recreation Center
Date of Race: 06-14-2025
Description: DescriptionA certified 5k Race starts on South Harrison Avenue in front ...
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Staunton State Park 10 Mile Trail Race- Aug ...
Organization: Evergreen Park & Recreation District
Date of Race: 08-02-2025
Description: DescriptionJoin us at Staunton State Park for a beautiful 10 mile ...
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Complete list of running events in and near Boulder, CO: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Boulder
About Boulder
Boulder (CO) is a city in Boulder County with an estimated population of 97,385.[4]
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Did you know?
In 2015, the 5K maintained the #1 position of all race distances with 7.6 million finishers (U.S.).
