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.
Muddy Dash - VIP Registration đź’Ž
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 - Value Registrations
Organization: Viral Run
Date of Race: 06-21-2025
Description: If you’ve done a traditional 5K, you know ...
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Bubble Run - Standard Registration
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 | May 10th, 2025
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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Muddy Dash - Standard 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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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 - VIP Registration
Organization: Viral Run
Date of Race: 06-21-2025
Description: If you’ve done a traditional 5K, you know ...
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Bubble Run | Denver | June 21st
Organization: Viral Run
Date of Race: 06-21-2025
Description: If you’ve done a traditional 5K, you know ...
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Run with the Buffalo Fun Run: 5K Distance
Organization: Commerce City Recreation Department
Date of Race: 12-07-2024
Description: DescriptionJoin us for our annual Run with the Buffalo ...
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Run with the Buffalo Fun Run: 2.5 Mile ...
Organization: Commerce City Recreation Department
Date of Race: 12-07-2024
Description: DescriptionJoin us for our annual Run with the Buffalo Ugly ...
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2025 Wicked Wine Run Denver, CO
Organization: Wicked Wine Run
Date of Race: 05-10-2025
Description: Whether you’re a seasoned runner or just love to walk and ...
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5K WICKED WINE RUN - Individual
Organization: Wicked Wine Run
Date of Race: 05-10-2025
Description: Whether you’re a seasoned runner or just love to walk and ...
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BOTH 5K + 1K! - Individual
Organization: Wicked Wine Run
Date of Race: 05-10-2025
Description: Whether you’re a seasoned runner or just love to walk and ...
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1K TASTING WALK - Individual
Organization: Wicked Wine Run
Date of Race: 05-10-2025
Description: Whether you’re a seasoned runner or just love to walk and ...
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Volunteer then Run! - Individual
Organization: Wicked Wine Run
Date of Race: 05-10-2025
Description: Whether you’re a seasoned runner or just love to walk and ...
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Dungeon Delvers with Renaissance Adventures - EVERY Friday!
Organization: Mack Boulder
Date of Race: 12-06-2024
Description: Join our dynamic game masters and story crafters for an in-person ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 02-18-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 02-18-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 02-20-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 01-09-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 01-07-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 01-09-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 01-07-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 01-09-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Cross Training for Endurance Sports
Organization: BOULDER PARKS & RECREATION (w)
Date of Race: 02-20-2025
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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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?
There were at least 768 marathons scheduled in the United States and Canada in 2016.
