RaceMob

Upcoming Aurora, Colorado Half Marathon Races

View some of the best Half Marathon races in Aurora, Colorado! RaceMob's race calendar allows you to find races that suits your needs. Use our advanced filters below or calendar on the right, and discover new races. We try to maintain up to date information, and rely heavily on our community of volunteers. If you find a race that we're missing, use the "Suggest Race" button on the right. Find RaceMob discounts that others have added or add deals that you've discovered.

    • 1/2M

    Georgetown, CO

    45.89 miles away

    I'm Attending

    Slacker Half Marathon-Relay-4-Mile Races

    Hey Beautiful Slackers!   The 2024 Slacker Races will be held on June 22   Get ready for an epic adventure at the 2024 Slacker Races! Seize the chance to earn your bragging rights as a true Slacker! Embark on this exhilarating journey starting at...

    • 1/2M

    Longmont, CO

    31.7 miles away

    I'm Attending

    Longmont Half & 5k (LM Half)

    Celebrate Independence Day with us, and join the Half Marathon or 5k distance!  Walkers and Runners of all abilities welcome!

    • 1/2M

    Westminster, CO

    16.62 miles away

    I'm Attending

    All-Out Dog Days

    Get ready for some fun in the sun and a great mid-season test of your training as we bring our 12th Annual Dog Days 5K, 10K & Half Marathon! Centrally located between Denver & Boulder along with its Endless Series sidekick in December Fa L...

    • 1/2M

    Castle Rock, CO

    22.11 miles away

    I'm Attending

    Summer Splash Prairie Dog Half, 10k, & 5k

    Welcome to the Summer Splash Prairie Dog Half, 10k & 5k in Castle Rock, Colorado. Part of the Prairie Dog Half race series, join us in July as we race through Castle Rock along the East Plum Creek Trail.  For all race info, click the "race in...

    • 1/2M

    Arvada, CO

    17.94 miles away

    I'm Attending

    All-Out Runapalooza

    / 2 RaceMobbers Scheduled

    As those summer mornings are just beginning to cool, join us for a celebration to end the season and our 11th Annual Runapalooza! From the award winning Apex Center, these 5K, 10K & Half Marathon courses will run west along the 2020 Best of th...

    • 1/2M

    Denver, CO

    5.38 miles away

    I'm Attending

    I'm Bound for Boston Marathon & Half Marathon - Denver

    Have you been dreaming of running Boston?  Need to shave a few minutes off your time to qualify?  Looking for the perfect course to set a PR?  Regardless, if you want to run Boston or not, THIS is the event for you!     We're racing around Northfi...

    • 1/2M

    Erie, CO

    25.28 miles away

    I'm Attending

    Erie Half & 5k

    Join us for the Erie Half and 5k!  The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.  LOOK UP! At the Erie event, we often see the early morning skies with...

    • 1/2M

    Parker, CO

    16.08 miles away

    I'm Attending

    Labor Day Half Marathon

    Celebrate the last blast of summer at the Labor Day Half Marathon. Sweat your socks off and let summer have its last hooray at Parker’s Salisbury Park, just a few miles southeast of Denver. There’s a distance to meet every taste with a half marath...

    • 1/2M

    Westminster, CO

    16.59 miles away

    I'm Attending

    All-Out Fall Fest

    / 2 RaceMobbers Scheduled

    One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with the Flatirons on the horizon will come into view. It...

    • 1/2M

    Greeley, CO

    47.57 miles away

    I'm Attending

    12th Annual Superhero Event

    This is the 12th year of our Superhero Event!  We are so excited to celebrate this milestone!  We will be back at Greeley's Family FunPlex and runners can participate in person in our 10K, 5K, 1 Mile and a free kids run or they can participate in ...

    • 1/2M

    Westminster, CO

    16.66 miles away

    I'm Attending

    Pioneer Prairie Dog Half, 10k & 5k

    Welcome to the Pioneer Prairie Dog Half Marathon event; the one that started the series! With 10k and 5k events too!  Everyone is back to school and slipping into a routine.  Make this your mental health break as you break away from the chaos of ...

    • 1/2M

    Westminster, CO

    16.66 miles away

    I'm Attending

    Westy Half & 5k

    Join us for the Westy Half in October where finishers from every distance earn a MEDAL! In 2024 we will be at the Westminster Promenade for the Westy Half and 5k! Join the Half Marathon or 5k distance!  Walkers and Runners of all abilities welco...

    • 1/2M

    Golden, CO

    21.37 miles away

    I'm Attending

    All-Out Kooky-Spooky

    From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 13th annual Kooky-Spooky from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sid...

    • 1/2M

    Westminster, CO

    16.59 miles away

    I'm Attending

    All-Out Fa La La

    Dash through the snow (or not snow) at our 13th annual Fa La La! Along with its Endless Series sidekick in July… Dog Days, the majesty of our breathtaking Flatirons as a backdrop will inspire you every step of these 5K, 10K & Half Marathon cou...

    • 1/2M

    Arvada, CO

    16.27 miles away

    I'm Attending

    All-Out Polar Prowl

    From the heart of the West Metro area and the Stenger Soccer Complex, All-Out brings you our 10th annual Polar Prowl! Along with its Endless Series sidekick in June, Summer Breeze, these 5K, 10K and Half Marathon courses will follow Van Bibber Cre...

    • 1/2M

    Louisville, CO

    23.21 miles away

    I'm Attending

    Arctic Prairie Dog Half, 10k & 5k

    We would love to have you join us for this fun event that kicks off our Prairie Dog Race Series! Make it your annual Martin Luther King Jr. remembrance weekend event!  Yes, we run in January and for many of the years, we've enjoyed WARM race morni...

    • 1/2M

    Arvada, CO

    17.94 miles away

    I'm Attending

    All-Out Mardi Crawl

    Welcome to the 8th annual All-Out Mardi Crawl, a Mardi Gras run in the Denver area! From the award winning Apex Center, these 5K, 10K & Half Marathon courses will run west along the 2020 Best of the Best Ralston Creek Trail through Arvada's op...

    • 1/2M

    Golden, CO

    21.37 miles away

    I'm Attending

    All-Out Spring Fever

    From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 13th annual Spring Fever from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sid...

    • 1/2M

    Westminster, CO

    16.59 miles away

    I'm Attending

    All-Out Beat the Heat

    Join us for the 13th annual Beat the Heat event, where one of Colorado's favorite trails meets one of its most glorious parks, all in support of Adaptive Adventures! Follow the winding courses southwest along Big Dry Creek Trail, and enjoy the bre...

    • 1/2M

    Brighton, CO

    13.93 miles away

    I'm Attending

    Runs With Scissors Races

    Saturday, April 26, 2025Half Marathon, Marathon and 50K all Start at 7:00 a.m. If you want your name included on the finisher's medal ribbon, and to be guaranteed a finisher medal, you must register before March 21, 2024. If registration for a dis...

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