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Run Vibes

Half Marathons in Westminster, CO

Westminster, CO has 6 upcoming Half Marathons. Half marathons are the fastest-growing race distance, offering a true endurance challenge with a more accessible training window than the full marathon.

6 upcoming races listed

Fun racesScenic racesCompetitive racesQuirky racesFestive racesFor a Cause racesBeginner-friendly
All-Out Beat the Heat

Embrace your inner hero on a scenic, hilly half marathon that's a BOLDERBoulder qualifier and supports Adaptive Adventures.

  • Fun
  • Scenic
  • Competitive
  • Quirky
  • For a Cause
Sat, Apr 18, 2026, 7:00 AM MDT13.1 MilesWestminster, CO
Push PotentialRUN

Course · Hilly · Timed race

All-Out Dog Days

A scenic, dog-friendly run with a costume contest, supporting Do Over Dogs. Perfect for a summer challenge with your pup.

  • Fun
  • Scenic
  • Quirky
  • Festive
  • For a Cause
Sat, Jul 11, 2026, 7:00 AM MDT13.1 MilesWestminster, CO
Push PotentialRUN

Course · Hilly · Timed race

Pioneer Prairie Dog Half, 10k & 5k

Find your stride and a mental health break at the Pioneer Prairie Dog Half, 10k & 5k in Westminster, CO.

  • Fun
Sun, Aug 23, 2026, 7:30 AM MDT13.1 MilesWestminster, CO
Push PotentialRUN

Course · Hilly · Timed race

All-Out Fall Fest

A scenic fall half marathon along Big Dry Creek Trail, featuring remarkable views of Standley Lake and the Flatirons.

  • Scenic
  • Festive
Sat, Sep 19, 2026, 7:00 AM MDT13.1 MilesWestminster, CO
Push PotentialRUN

Course · Hilly · Timed race

Westy Half & 5k

Join the Hometown Race Series in Westminster for a fall half marathon or 5k, where every participant earns a finisher medal.

  • Fun
Sun, Oct 11, 2026, 8:00 AM MDT13.1 MilesWestminster, CO
Push PotentialRUN

Course · Hilly · Timed race

All-Out Fa La La

Hit the scenic trails this holiday season with your furry friend, support a great cause, and soak in Front Range views.

  • Fun
  • Scenic
  • Festive
  • For a Cause
Sat, Dec 5, 2026, 9:00 AM MST13.1 MilesWestminster, CO
Push PotentialRUN

Course · Hilly · Walkers welcome

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More Half Marathon races

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Other distances in Westminster, CO

5Ks in Westminster, CO10Ks in Westminster, COMarathons in Westminster, CO