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Best Thornton, Colorado Races

View some of the best races in Thornton, 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.

    Lakewood, CO

    10.11 miles away

    I'm Attending

    RMRR March 7th 2021- 3 Miles at Crown Hill Park

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key and COVID-safe running environment, and everyone is welcome to run with us! Our March race will run in Crown Hill Park, and we will have a...

    Fort Lupton, CO

    16.97 miles away

    I'm Attending

    5 k training

    DescriptionTraining 4 days a week for 8 weeks with Mandy or Lacie. You will automatically be enter into the 5k race on May 1st. Training will always start at the Recreation Center but we may run some courses. Don't forget to give us your shirt ...

    Fort Lupton, CO

    16.97 miles away

    I'm Attending

    5 k training

    DescriptionTraining 4 days a week for 8 weeks with Mandy or Lacie. You will automatically be enter into the 5k race on May 1st. Training will always start at the Recreation Center but we may run some courses. Don't forget to give us your shirt ...

    • 10K, 5K

    Windsor, CO

    42.38 miles away

    I'm Attending

    Lucky Brew Race 5k & 10k

    A New 5k and 10k Course! Start your St. Patrick's celebration with either a 5k or 10k on the Kyger and Poudre River Trail. All participants will receive chip timing, free finish line video footage & photos, rockin’ Lucky Brew Socks while supp...

    Loveland, CO

    38.68 miles away

    I'm Attending

    Fill the Love Fun Run/Walk

    In partnership with the Fill the Love campaign, this is going to be our first, and potentially only, “Fill the Love” Fun Run in the sandy lake bottom that is Lake Loveland on Friday, March 19th at 5:30 from the Lake Loveland Swim Beach.  The Fun R...

    • 5K

    Denver, CO

    8.69 miles away

    I'm Attending

    Central Park 5k - LIVE, IN PERSON EVENT!

    Is it spring or still winter?  We'll know when we run the Central Park 5k on the fourth Sunday in March!  Celebrate the end of winter with us on this flat and fast course in Stapleton's neighborhood Central Park!

    Denver, CO

    8.82 miles away

    I'm Attending

    DEKA STRONG - Denver, CO - April 3rd 2021

    Attention Denver! Spartan is excited to introduce our new indoor challenge designed to test, gamify and celebrate your fitness. Spartan DEKA consists of (10) functional training zones with zero running. Compete and Earn your DEKA STRONG Mark and s...

    • 10K, 1/2M, , 5K

    Arvada, CO

    9.65 miles away

    I'm Attending

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

    The Arvada event supports Community Table, an Arvada Foodbank.  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 ...

    • , 5K, 10K, 1/2M

    Arvada, CO

    9.65 miles away

    I'm Attending

    Spring Fling Prairie Dog Half, 10k, 5k

    The Arvada event supports Community Table, an Arvada Foodbank.  Bring 5 items for donation on race day and you'll be entered into a raffle for great prizes! Welcome to the SPRING FLING Prairie Dog Half!  This spring-time event also features 10k a...

    Denver, CO

    8.65 miles away

    I'm Attending

    RMRR April 11th Race - 4M at City Park

    April is a lovely time to run with RMRR, and the City Park 4M run is a great way to celebrate spring.  We usually have fabulous spring weather for this run, and it’s fun to run around the park and the zoo.   As always, everyone is welcome, and jus...

    Littleton, CO

    20.54 miles away

    I'm Attending

    Healthy Kids Running Series Spring 2021 - Littleton, CO

    Healthy Kids Running Series is a five (5) week running program in the spring and fall for kids Pre-K through 8th grade. Each HKRS Series takes place once a week and offers age appropriate running events including the 50 & 75 yard dashes, the 1...

    Denver, CO

    16.2 miles away

    I'm Attending

    Healthy Kids Running Series Spring 2021 - Denver, CO

    Healthy Kids Running Series is a five (5) week running program in the spring and fall for kids Pre-K through 8th grade. Each HKRS Series takes place once a week and offers age appropriate running events including the 50 & 75 yard dashes, the 1...

    • M, , 5K

    Anywhere USA, PA

    48.34 miles away

    I'm Attending

    Run Philadelphia HYBRID 5K/10K/Half-Marathon 2021

    Experience & Learn about Philadelphia - the City of Brotherly love virtually on this run! We'll send you a beautiful tin can of cookies with the Premium packet! What is a hybrid event? A hybrid event is where you'll be able to virtual run on ...

    Aurora, CO

    24.05 miles away

    I'm Attending

    Healthy Kids Running Series Spring 2021 - Aurora, CO

    Healthy Kids Running Series is a five (5) week running program in the spring and fall for kids Pre-K through 8th grade. Each HKRS Series takes place once a week and offers age appropriate running events including the 50 & 75 yard dashes, the 1...

    • , 5K

    Denver, CO

    10.9 miles away

    I'm Attending

    Mile High Mile & 5k

    Think you're the fastest in Denver? Test your spikes at the Mile High Mile with prizes for ELITE and OPEN divisions!  A 5k event is also offered!

    Fort Lupton, CO

    16.97 miles away

    I'm Attending

    Cinco de Mayo 5K Race (2021)

    DescriptionCalling all runners & walkers!! Come join us for the Cinco de Mayo race that helps benefit the Fort Lupton Recreation Center Programs. Your time from this event also qualifies you for the Bolder Boulder Run. Whether you are an avi...

    • , 5K

    Denver, CO

    8.69 miles away

    I'm Attending

    RMRR May 2nd 2021 - 5 Miler and 5K at Stapleton's Central Park

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key and COVID-safe running environment, and everyone is welcome to run with us! Our May 2021 race will run at Stapleton's Central Park, and we...

    • 5K

    Highlands Ranch, CO

    23.87 miles away

    I'm Attending

    2021 HRCA Mother's Day 5K

    Bring your family and friends and join in the fun at the 7th Annual HRCA Mother’s Day 5K! Soak in the amazing views of the front range, Highlands Ranch Windmill and Highlands Ranch Mansion by running, walking, or strolling. Sign up dad and the kid...

    • , 5K

    Lakewood, CO

    12.92 miles away

    I'm Attending

    Federal Cup 5k

    COME JOIN US FOR THE 2021 FEDERAL CUP 5K This will 36th Running of the Federal Cup 5K. Each participant gets a snapback trucker hat! The 2021 Federal Cup 5K Run and Walk is a timed event at the Denver Federal Center with a 1K Kids Fun Run too!  ...

    Denver, CO

    8.62 miles away

    I'm Attending

    Week 1 | Ages 8-11

    Stay active this summer: Get Outside, Work Hard, Have Fun! Weeklong, half-day camps geared at giving every kid elite coaching to reach their potential. Improve technique + increase speed and strength in a positive, non-competitive environment. O...

    Denver, CO

    8.62 miles away

    I'm Attending

    Week 1 | Ages 12-16

    Stay active this summer: Get Outside, Work Hard, Have Fun! Weeklong, half-day camps geared at giving every kid elite coaching to reach their potential. Improve technique + increase speed and strength in a positive, non-competitive environment. O...

    Denver, CO

    8.62 miles away

    I'm Attending

    Week 1 | Ages 10-13

    Stay active this summer: Get Outside, Work Hard, Have Fun! Weeklong, half-day camps geared at giving every kid elite coaching to reach their potential. Improve technique + increase speed and strength in a positive, non-competitive environment. O...

    Denver, CO

    14.46 miles away

    I'm Attending

    RMRR June 6th 2021 - 4K Race at Bible Park

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key and COVID-safe running environment, and everyone is welcome to run with us! Our June race will run in Denver's Bible Park, and we will hav...

    • 5K

    Denver, CO

    9.17 miles away

    I'm Attending

    Flamingo Day 5K

    For more info, please visit the official race website: www.ColoradoRunnerEvents.com

    • 5K,

    Westminster, CO

    6.95 miles away

    I'm Attending

    Six Pack Summer Series Westminster- 1 mile & 5k

    Join us for a fun progressive series in Westminster! Series participants will enter at their own pace - running a 1 mile race in the first event and adding a mile at each event to complete a full 10k (6.2 Mile) race at the end of the series.  Th...

    • 5K

    Lafayette, CO

    10.52 miles away

    I'm Attending

    Run for the Sun 5K

    Run for the Sun 5K 2021, the 4th annual event, will once again be offered in a family-friendly and socially-conscious virtual format. You're invited to run or walk your own event (approximately 5K or 3500 steps) in your own way (on a treadmill, la...

    • , 5K

    Westminster, CO

    6.95 miles away

    I'm Attending

    Six Pack Summer Series Westminster- 2 mile & 5k

    Join us for a fun progressive series in Westminster!  Series participants will enter at their own pace - running a 1 mile race in the first event and adding a mile at each event to complete a full 10k (6.2 Mile) race at the end of the series.  Th...

    Denver, CO

    11.76 miles away

    I'm Attending

    2nd Annual Easterseals Colorado Walk With Me

    Ready to walk!? Join us for Easterseals Colorado for our Second annual Walk With Me event! Colorado is home to more than 600,000 people living with disabilities. Since 1926, Easterseals Colorado has been a vital resource for people with disabilit...

    • 5K, 10K

    Loveland, CO

    36.25 miles away

    I'm Attending

    Loveland Liberty 5K

    The LL5K, hosted by Sweetheart City Racing is scheduled to begin at Loveland Fairgrounds Park on Thursday, July 4th at 6:00 am. We are proud to support a local Veteran group, High Plains Honor Flight with the 2020 Liberty 5K.   Race Day Protocol...

    Lakewood, CO

    15.42 miles away

    I'm Attending

    RMRR July 11th 2021 - 2 Mile Race at Lakewood's Stonehouse

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key and COVID-safe running environment, and everyone is welcome to run with us! Our July race will run in Lakewood's Stonehouse Park, and we w...

    • 5K,

    Westminster, CO

    6.92 miles away

    I'm Attending

    Six Pack Summer Series Westminster- 5 mile & 5k

    Join us for a fun progressive series in Westminster!  Series participants will enter at their own pace - running a 1 mile race in the first event and adding a mile at each event to complete a full 10k (6.2 Mile) race at the end of the series.  Th...

    • , 1/2M, 5K

    Estes Park, CO

    44.67 miles away

    I'm Attending

    Rocky Mountain Half Marathon

    Escape to the mountains, breathe in crisp, fresh air, and enjoy a vacation unlike any other when you join us for this scenic run in historic Estes Park, Colorado, just outside Rocky Mountain National Park.If you've ever considered registering for ...

    • , 5K, 1/2M

    Fraser, CO

    43.58 miles away

    I'm Attending

    2021 Winter Park Half Marathon & 5K

    Push your limits with these stunning, remote races in the heart of the Rocky Mountains - located just 60 miles outside of Denver! Our Half Marathon and 5K are perfect for athletes of all levels, but will be sure to challenge you as you enjoy the b...

    Centennial, CO

    18.33 miles away

    I'm Attending

    RMRR August 6th 2021 Race - 5K at DeKoevend Park

    August is hot...but still a great time to run, and we hope you'll come join the runners of RMRR.  We'll run our August 5k on the Highline Canal around DeKoevend Park, and we'll do it carefully and safely.  As always, everyone is welcome, and it's ...

    • 5K

    Centennial, CO

    19.79 miles away

    I'm Attending

    Arapahoe Warrior 5K

    Come out and support the Arapahoe Warrior Cross Country team at the 1st annual Arapahoe Warrior 5K. $10.00 of every registration goes directly back to the Arapahoe Cross Country Booster team. Start and finish with a lap around the track and stick ...

    • 5K,

    Loveland, CO

    38.72 miles away

    I'm Attending

    Valley 5000

    With over 300 runners expected and even more spectators, this will be an amazing year for the Valley 5000, hosted by Sweetheart City Racing. This run/walk is scheduled to begin in Mehaffey Park on August 20, 2021. We are proud to support House of ...

    • 5K,

    Westminster, CO

    5.12 miles away

    I'm Attending

    The Sixth Annual Eye Love Logan and Zoe 5k

    We are thrilled to announce that we have just been given permission to have the Eye Love Logan and Zoe 5k this year in person!!!  So keep wearing those masks so we can all be together and celebrate. :) So, for those of you who want to come run wi...

    • 5K,

    Denver, CO

    1.87 miles away

    I'm Attending

    RMRR September 12th 2021 - 10 Miler and 5K at Trailhead Park

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key and COVID-safe running environment, and everyone is welcome to run with us! Our September  race will run in Thornton from Platte River Tra...

    • 5K

    Highlands Ranch, CO

    22.23 miles away

    I'm Attending

    2021 HRCA OKTOBERFEST 5K- Presented by PDC Energy

    Put on your lederhosen and your running/walking shoes and join us as we kick-start the annual Highlands Ranch Community Association's Oktoberfest event in Town Center with the Oktoberfest 5K!  The HRCA Oktoberfest 5K course is a mixture of both s...

    • 1/2M, , 10K, M

    Windsor, CO

    40.82 miles away

    I'm Attending

    Windsor Marathon 26.2, 13.1, Heavy 10K

    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, music and live entertainment! New to the series is a Full Marathon distance...

    • , 5K

    Lakewood, CO

    18.38 miles away

    I'm Attending

    The Great Trailhead Foot Race 10 Miler & 5k

    Welcome to the Great Trailhead Foot Race at Bear Creek Lake Park!  Featuring legitimate TRAILS in the shadow of Denver's skyline, you'll love the single-track and dirt as you race 10 miles to the finish line party!  Don't quite have 10 miles in ya...

    Loveland, CO

    38.68 miles away

    I'm Attending

    Harvest Night Fun Run and Fall Festival

    Come join us for a fun 2-mile run and fall festival. Music, food trucks, and more! This event benefits Loveland Parks and Rec Foundation.  We will have wave starts with a virtual option too!

    • 5K

    Denver, CO

    8.66 miles away

    I'm Attending

    City Park 5k

    Get ready for the winter season while enjoying a race with your friends at the City Park 5k!  

    • 10K, 5K,

    Denver, CO

    8.66 miles away

    I'm Attending

    Pumpkin Pie 5K

    For more info, please visit the official race website: www.ColoradoRunnerEvents.com

    Denver, CO

    11.86 miles away

    I'm Attending

    RMRR December 5th 2021 - 4.5M Race at Denver's Washington Park

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key and COVID-safe running environment, and everyone is welcome to run with us! Our December 2020 race will run in Denver's Washington Park, a...

    • 5K

    Fort Collins, CO

    48.19 miles away

    I'm Attending

    Resolution Run 5K

    Run out the old year, and welcome the new! Now in its 37th year, the Resolution Run is a family-friendly, neighborhood streets 5K starting & finishing at the Edora Pool Ice Center.Kids, strollers, dogs & walkers welcome!Finish in under 20:...

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