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.
16 and under 10K - Individual Age group/open
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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Senior (60+) 10K - Individual Age group/open
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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2026 Eerie Erie
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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16 and under 5K - Individual Age group/open
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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Adult (17+) 5K - Individual Age group/open
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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Senior (60+) 5K - Individual Age group/open
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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Adult (17+) 10K - Individual Age group/open
Organization: Optimist Club of Erie, Colorado
Date of Race: 10-31-2026
Description: The world-famous Eerie Erie is a Halloweenthemed 5k and ...
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Friendsgiving
Organization: Commerce City Recreation Department
Date of Race: 11-19-2026
Description: DescriptionJoin us for a Friendsgiving Potluck! Bring your favorite holiday dish ...
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Bright Nights at Four Mile Historic Park
Organization: Fort Lupton Recreation Center
Date of Race: 10-28-2026
Description: Age GroupSeniors
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Turkey Burn
Organization: Fort Lupton Recreation Center
Date of Race: 11-26-2026
Description: DescriptionStart your Thanksgiving the right Way! Join us for a ...
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Nov: Neighbor Nights- Community Service Night
Organization: Thompson Rivers Parks and Recreation District
Date of Race: 11-13-2026
Description: Description
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Race to the Shield Homecoming Run
Organization: Berthoud High Boosters
Date of Race: 09-26-2026
Description: 1st Annual Race to the Shield Homecoming ...
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Dinner out – Cherry Cricket (11/30)
Organization: Commerce City Recreation Department
Date of Race: 11-30-2026
Description: Description Long-running hub with build-your-own burgers among other American staples & ...
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Dinner out – Cherry Cricket (11/30)
Organization: Commerce City Recreation Department
Date of Race: 11-30-2026
Description: Description Long-running hub with build-your-own burgers among other American staples & ...
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Dinner out – Cherry Cricket (11/30)
Organization: Commerce City Recreation Department
Date of Race: 11-30-2026
Description: Description Long-running hub with build-your-own burgers among other American staples & ...
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Soccer Tots by SuperTots Sports 2yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 11-13-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 2yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 11-13-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 3yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 10-05-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 2yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 10-05-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 3yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 10-05-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 2yrs to 2yrs ...
Organization: Commerce City Recreation Department
Date of Race: 11-13-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 3yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 11-13-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Soccer Tots by SuperTots Sports 3yrs 7m to ...
Organization: Commerce City Recreation Department
Date of Race: 10-05-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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Other-2 Mile Run - General Admission
Organization: Berthoud High Boosters
Date of Race: 09-26-2026
Description: 1st Annual Race to the Shield Homecoming ...
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Soccer Tots by SuperTots Sports 2yrs to 2yrs ...
Organization: Commerce City Recreation Department
Date of Race: 11-13-2026
Description: DescriptionSoccerTots is our flagship program! Our classes ...
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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?
The number of U.S. marathon finishers declined from 2014 to 2015 approximately 8 percent.
