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 ...
View Race Details View on Map
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 ...
View Race Details View on Map
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 ...
View Race Details View on Map
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 ...
View Race Details View on Map
Neighbor Nights: Mario Cart Tournament
Organization: Thompson Rivers Parks and Recreation District
Date of Race: 01-16-2026
Description: DescriptionStart the new ...
View Race Details View on Map
1/24 Bald Eagle Outing
Organization: Bird Conservancy of the Rockies
Date of Race: 01-24-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
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 ...
View Race Details View on Map
12/27 Bald Eagle Outing
Organization: Bird Conservancy of the Rockies
Date of Race: 12-27-2025
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
1/10 Bald Eagle Outing
Organization: Bird Conservancy of the Rockies
Date of Race: 01-10-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
2/14 Bald Eagle Outing
Organization: Bird Conservancy of the Rockies
Date of Race: 02-14-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
1/3 Bald Eagle Outing
Organization: Bird Conservancy of the Rockies
Date of Race: 01-03-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 08-10-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 07-20-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 06-08-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 07-06-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 07-27-2026
Description: Experience the serene beauty of Barr Lake State Park while observing ...
View Race Details View on Map
Week 02 | Ages 8-11 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 06-08-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
Week 10 | Ages 8-11 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 08-03-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
Week 10 | Ages 12-15 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 08-03-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
Week 11 | Ages 8-11 | 10am-2pm @ ...
Organization: Mighty Movement
Date of Race: 08-10-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
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! ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 06-15-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 07-13-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 07-20-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
<< SELECT SESSION
Organization: Mighty Movement
Date of Race: 08-03-2026
Description: LOUISVILLE'S BEST ACTIVE SUMMER CAMP: Get Outside, Work Hard, Have Fun! ...
View Race Details View on Map
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]
Races Local Newsletter
Subscribe to get the latest on racing delivered to your inbox, once per week.
Did you know?
There were at least 768 marathons scheduled in the United States and Canada in 2016.
