Running races in or near Longmont, CO
Marathons, 1-milers, 5Ks, half-marathons, 10Ks & more
See below for a frequently-updated, comprehensive list of upcoming running events in the local Longmont, 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 - 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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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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24 Hour - Individual Age group/open
Organization: Gnar Runners 2015
Date of Race: 11-01-2025
Description: Welcome to the Colorado 24 Hour Run! We aim to provide ...
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12 Hour - Individual Age group/open
Organization: Gnar Runners 2015
Date of Race: 11-01-2025
Description: Welcome to the Colorado 24 Hour Run! We aim to provide ...
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6 Hour - Individual Age group/open
Organization: Gnar Runners 2015
Date of Race: 11-01-2025
Description: Welcome to the Colorado 24 Hour Run! We aim to provide ...
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Colorado 24 Hour Run
Organization: Gnar Runners 2015
Date of Race: 11-01-2025
Description: Welcome to the Colorado 24 Hour Run! We aim to provide ...
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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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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 - 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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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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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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Youth Basketball League-Grade 5-6 (Girls)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League-Grade 5-6 (Girls)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League-Grade 5-6 (Girls)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League-Grade 5-6 (Boys)
Organization: Commerce City Recreation Department
Date of Race: 01-05-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League -Grade 3-4 (Boys)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League -Grade 3-4 (Girls)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League-Grade 5-6 (Boys)
Organization: Commerce City Recreation Department
Date of Race: 01-05-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League -Grade 3-4 (Boys)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League -Grade 3-4 (Boys)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League -Grade 3-4 (Girls)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Youth Basketball League -Grade 3-4 (Girls)
Organization: Commerce City Recreation Department
Date of Race: 01-10-2026
Description: DescriptionInternet Registration has not begun yet. Check Registration Dates in ...
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Complete list of running events in and near Longmont, CO: Marathons, 1-milers, 5Ks, half-marathons, 10Ks, obstacle courses, walking events & more.
More information about Longmont
About Longmont
Longmont (CO) is a city in Boulder County with an estimated population of 86,270.[4]
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Did you know?
There were at least 768 marathons scheduled in the United States and Canada in 2016.
