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.
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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Muddy Dash - Exclusive VIP Registration - ...
Organization: Viral Run
Date of Race: 09-13-2025
Description: Muddy Dash is not your average mud run! Get ready 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 | Denver
Organization: Viral Run
Date of Race: 09-13-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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Muddy Dash - VALUE REGISTRATION - R̶e̶g̶u̶l̶a̶r̶ ...
Organization: Viral Run
Date of Race: 09-13-2025
Description: Muddy Dash is not your average mud run! Get ready for ...
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Coach Mike's Running Club with Mike Holloway - ...
Organization: Mack Boulder
Date of Race: 08-25-2025
Description: Come join me for some after school movement! This K-5 running ...
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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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Bergen Peak 5k Trail Race- Sept 13
Organization: Evergreen Park & Recreation District
Date of Race: 09-13-2025
Description: DescriptionThis 5K race leads runners throughout the rolling hills of Elk ...
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Cross Country Middle School Team
Organization: Mack Boulder
Date of Race: 08-26-2025
Description: Join our Mackintosh Academy Cross Country Team! We will practice twice ...
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Fall Dryland - ATC - Freestlye & Freeride
Organization: Lake Eldora Racing
Date of Race: 08-26-2025
Description: Stay in shape and improve your strength, improve your on snow ...
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U16 Dryland- ATC + Field Workouts
Organization: Lake Eldora Racing
Date of Race: 08-18-2025
Description: Dryland Training August 19th - November 14th Tues. Thurs.
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U14 Dryland + Field Workouts
Organization: Lake Eldora Racing
Date of Race: 08-20-2025
Description: Dryland Training Tues. Thurs. Alpine Training Center, 4pm - ...
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Fall Dryland - Workouts in the park - ...
Organization: Lake Eldora Racing
Date of Race: 08-26-2025
Description: Stay in shape and improve your strength, stamina and balance to ...
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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- 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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Bard's Backstage Pass: A Deeper Dive into CSF's ...
Organization: Colorado Shakespeare Festival
Date of Race: 08-01-2025
Description: This 2-day, immersive weekend experience takes you behind-the-scenes of the Colorado ...
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YS: Co-Ed Flag Football 11-12 @ Central Park
Organization: City and County of Denver
Date of Race: 09-04-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 11-12 @ 5090 Broadway
Organization: City and County of Denver
Date of Race: 09-04-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 11-12 @ Scheitler
Organization: City and County of Denver
Date of Race: 09-04-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 5-6 @ Barnum
Organization: City and County of Denver
Date of Race: 09-03-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 7-8 @ 5090 Broadway
Organization: City and County of Denver
Date of Race: 09-03-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 7-8 @ Scheitler
Organization: City and County of Denver
Date of Race: 09-03-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 7-8 @ Rude
Organization: City and County of Denver
Date of Race: 09-02-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 9-10 @ 5090 Broadway
Organization: City and County of Denver
Date of Race: 09-02-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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YS: Co-Ed Flag Football 9-10 @ Glenarm
Organization: City and County of Denver
Date of Race: 09-02-2025
Description: DescriptionThis recreational team/league is designed to introduce the fundamentals of the ...
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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.).
