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!
May 02, 2027
Distance — 21.1K
Type — Running
07:30
$64.00
May 02, 2027
Distance — 5K
Type — Running
08:30
$39.00
These values represent the 3-year monthly averages for May in Longmont.
Learn more about the host city, Longmont.
Longmont is a city of about 100,000 in North Central Colorado. The city lies in Boulder and Weld counties 30 miles (48 km) north-northwest of the Denver.
Read more launchTours and activities near Longmont, powered by Viator.
Watch highlights and course previews from previous years.
Read what other athletes have to say about their experience at the Longmont Half & 5k (LM Half).
Be the first to share your experience with the community!
Spotted an error or missing detail about the Longmont Half & 5k (LM Half)? Help us improve.
Explore other exciting events happening in this same region.
location_on Longmont, Colorado, US
calendar_today Nov 07, 2026
Hand-picked events we think you’ll love.
Oct 01, 2026
Relevant Running is always looking to help keep you motivated and inspired. Join us throughout October 2026 for the Mon…
Read more
Oct 01, 2026
🏖️ Why You'll Love This Race 🌊Oceanfront course with breathtaking views of the Atlantic - Walk, jog, or sprint! 🍹Post r…
Read more
