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Best Denver, Colorado Half Marathon Races

View some of the best Half Marathon races in Denver, 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

    Louisville, CO

    17.41 miles away

    I'm Attending

    Prairie Dog Series PACKAGE OF FOUR EVENTS

    Join Peedy the Prairie Dog every season for the Prairie Dog Half Marathon Series! This is the PACKAGE registration to become enrolled in ALL FOUR events offered in Colorado in 2022* 2022 Prairie Dog Half Marathon Package:For just $225.00 (Price i...

    • 1/2M

    Denver, CO

    2.23 miles away

    I'm Attending

    Valentines Cupid Run DENVER VR

    Run in our first Valentines Cupid Run on your own time and pace on our designed course! How it Works:1. Signup for the Marathon, Half-Marathon, 10K, or 5K.   2. Get a running shirt, race bib, finisher's medal and race course mailed to you.  3. Sta...

    • 1/2M

    Anywhere, CO

    4.56 miles away

    I'm Attending

    Sunrise Marathon COLORADO VR

    Run in our first Sunrise Marathon Virtually!    How it Works:1. Signup for the Marathon, Half-Marathon, 10K, or 5K.   2. Get a running shirt, race bib, finisher's medal and race course mailed to you.  3. Start @ the same start line as others a...

    • 1/2M

    Denver, CO

    2.66 miles away

    I'm Attending

    Sunrise Marathon VR DENVER

    Run in our first Sunrise Marathon on your own time and pace on our designed course! How it Works:1. Signup for the Marathon, Half-Marathon, 10K, or 5K.   2. Get a running shirt, race bib, finisher's medal and race course mailed to you.  3. Start @...

    • 1/2M

    Englewood, CO

    9.66 miles away

    I'm Attending

    Three Creeks Half Marathon

    Welcome to Denver's Best Spring Half Marathon! Saturday April 3, 2021 at Cherry Creek State Park Racing Underground brings you an amazing half marathon this spring! The Three Creeks Half Marathon features a half marathon course that is flat, fas...

    • 1/2M

    Arvada, CO

    10.19 miles away

    I'm Attending

    Spring Fling Prairie Dog Half, 10k, & 5k

    The Arvada event supports Community Table, an Arvada Food bank.  Bring 5 items for donation on race day and you'll be entered into a raffle for great prizes from 3W Races and our sponsors! Welcome to the SPRING FLING Prairie Dog Half (part of the...

    • 1/2M

    Georgetown, CO

    37.72 miles away

    I'm Attending

    Slacker Half Marathon-Relay-4-Mile Races

    Come join us for the highest DOWNHILL half marathon in the country and possibly the highest DOWNHILL 4 Mile Run! Do not be misled by the name but this is the Slacker Half Marathon/4M Race! It is the highest downhill half marathon in the country–b...

    • 1/2M

    Castle Rock, CO

    23.12 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. Visit www.PrairieDogHalf.com for more information on this event: http://prairiedoghalf.com/summer.html  

    • 1/2M

    Pine, CO

    26.75 miles away

    I'm Attending

    Staunton Rocks! Marathon & Half

    Welcome to the Staunton Rocks! Marathon & Half, an event put on by trail runners for trail runners. Touring the renowned singletrack of Staunton State Park in Colorado’s Front Range Mountains southwest of Denver, the race will take you back i...

    • 1/2M

    Longmont, CO

    30.39 miles away

    I'm Attending

    American Heroes Run

    The tragic events of 9/11/01 changed our nation forever. Let us not forget our proud history and those who fight everyday to keep us free. Please join us for this special day on this beautiful, flat, fast 1.05-mile loop course. The 100-mile race c...

    • 1/2M

    Windsor, CO

    49.77 miles away

    I'm Attending

    Windsor Marathon, Half Marathon, 10K & 5K

    Welcome to the second annual Windsor CO Race! This year's event will start and end at The Island at Pelican Lakes in Water Valley, with a great after party including beer, food, music and a live band! New to the series is a Full Marathon distance,...

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