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Longmont Half & 5k (LM Half)

Sun, May 2, 2027

In 171 days

Longmont, CO

Sandstone Ranch Park

Typically 38–64°F · some rain risk

See last 10 years

On this date: rain 5 of the last 10 years

2026

34–70°F

dry

2025

34–63°F

dry

2024

35–60°F

dry

2023

44–69°F

dry

2022

36–47°F

rain

2021

47–66°F

rain

2020

48–66°F

rain

2019

34–57°F

dry

2018

43–51°F

rain

2017

38–59°F

rain

Best months to race in Colorado →

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About this race

Longmont's only Half Marathon - now offered in the cooler month of MAY! Join the Half Marathon or 5k distance! Walkers and Runners of all abilities welcome!

Course map

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Train with a club

Run clubs near Longmont to train with before race day.

Fleet Feet Boulder

Boulder Road Runners

Atomic Track Club

Sweetheart City Racing

See all run clubs near Longmont →

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