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.
Running-5K - Team of 5
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 22-8AM START AND FINISH AT ...
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Running-5K - Team of 3
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 22-8AM START AND FINISH AT ...
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Running-5K - Team of 4
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 22-8AM 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 22-8AM 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 22-8AM START AND FINISH AT ...
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Price
Organization: Colorado Track & Cross Country Camps
Date of Race: 07-07-2025
Description: SUNDAY, JUNE 22-8AM START AND FINISH AT ...
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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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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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13th Annual Buffs4Life 5k Walk/Run
Organization: Buffs4Life
Date of Race: 06-22-2025
Description: SUNDAY, JUNE 22-8AM START AND FINISH AT ...
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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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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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Breakfast & Four Mile Historic Park
Organization: Fort Lupton Recreation Center
Date of Race: 07-24-2025
Description: Age GroupSeniors
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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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Price
Organization: Colorado Womens Basketball
Date of Race: 06-23-2025
Description: Welcome to the Colorado 24 Hour Run! We aim to provide ...
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Price
Organization: Colorado Womens Basketball
Date of Race: 06-23-2025
Description: Welcome to the Colorado 24 Hour Run! We aim to provide ...
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Little Dribblers Camp I
Organization: Colorado Womens Basketball
Date of Race: 06-23-2025
Description: Little Dribblers Camp is for the first time camper or a ...
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Individual Camp I
Organization: Colorado Womens Basketball
Date of Race: 06-23-2025
Description: Individual Camp is a great opportunity for any player looking to ...
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Week 03 | Ages 10-14 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 06-16-2025
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Week 04 | Ages 10-14 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 06-23-2025
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 06-23-2025
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 06-16-2025
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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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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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?
In 2014, there were more than 1,100 marathons and more than 541,000 finishers in the U.S.
