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 of the Green
Organization: Fort Lupton Recreation Center
Date of Race: 03-14-2026
Description: DescriptionFamily fun Run ( wear your green) best dress wins a ...
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Running of the Green
Organization: Fort Lupton Recreation Center
Date of Race: 03-14-2026
Description: DescriptionFamily fun Run ( wear your green) best dress wins a ...
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Running of the Green
Organization: Fort Lupton Recreation Center
Date of Race: 03-14-2026
Description: DescriptionFamily fun Run ( wear your green) best dress wins a ...
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Muddy Dash - Exclusive VIP Registration - ...
Organization: Viral Run
Date of Race: 06-20-2026
Description: Muddy Dash is not your average mud run! Get ready for ...
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Muddy Dash | Denver 2026
Organization: Viral Run
Date of Race: 06-20-2026
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: 06-20-2026
Description: Muddy Dash is not your average mud run! Get ready for ...
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Valentine's Date with Mom
Organization: Commerce City Recreation Department
Date of Race: 02-12-2026
Description: DescriptionJoin us for an evening of fun, food, and connection, hosted ...
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Price
Organization: Colorado Womens Basketball
Date of Race: 06-15-2026
Description: DescriptionJoin us for an evening of fun, food, and connection, hosted ...
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Individual Camp I
Organization: Colorado Womens Basketball
Date of Race: 06-15-2026
Description: Individual Camp is a great opportunity for any player looking to ...
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Price
Organization: Colorado Womens Basketball
Date of Race: 06-15-2026
Description: Individual Camp is a great opportunity for any player looking to ...
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Little Dribblers Camp I
Organization: Colorado Womens Basketball
Date of Race: 06-15-2026
Description: Little Dribblers Camp is for the first time camper or a ...
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2/28 Bald Eagle Outing
Organization: Bird Conservancy of the Rockies
Date of Race: 02-28-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
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Organization: Mighty Movement
Date of Race: 06-15-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
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Organization: Mighty Movement
Date of Race: 07-13-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
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Week 07 | Ages 8-11 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 07-13-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Organization: Mighty Movement
Date of Race: 08-03-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Organization: Mighty Movement
Date of Race: 06-15-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Organization: Mighty Movement
Date of Race: 06-22-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Organization: Mighty Movement
Date of Race: 07-06-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Week 03 | Ages 8-11 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 06-15-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Week 08 | Ages 8-11 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 07-20-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Week 04 | Ages 12-15 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 06-22-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Week 07 | Ages 12-15 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 07-13-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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Week 11 | Ages 12-15 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 08-10-2026
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: 07-13-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
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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 2015, the 5K maintained the #1 position of all race distances with 7.6 million finishers (U.S.).
