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Best Boulder, Colorado Races

View some of the best races in Boulder, 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.

    Denver, CO

    23.17 miles away

    I'm Attending

    NIGHT NATION RUN - DENVER

    The Night Nation Run is the World’s first Running Music Festival the ultimate blend of a Music Festival and a Fun Run. Experience a music filled course with Live DJs, Bubble Zones, Light Shows, Neon and Black Lights! Cross the finish line into an ...

    • 5K, , 10K

    Denver, CO

    20.11 miles away

    I'm Attending

    Move Forward 5K & 10K

    AboutThe Move Forward 5K/10K is an event created by the Doctor of Physical Therapy students at Regis University as a community outreach project. The proceeds from the event will benefit Canine Companions for Independence and the Foundation for Phy...

    Brighton, CO

    18.85 miles away

    I'm Attending

    DEKAFIT STRONG 2 - Denver

    Attention Denver! DEKAFIT by the Creators of Spartan is excited to introduce our new challenge to test and celebrate your fitness. DEKAFIT STRONG consists of (10) functional training zoneswith zero running.Compete and Earn your DEKA STRONG Mark an...

    • , 5K

    La Salle, CO

    33.73 miles away

    I'm Attending

    CerusRuk 2020

    A 4-5 Mile Obstacle Course Race with 23+ obstacles hosted by Cerus Fitness.  The course is designed to challenge both recreational and competitive racers. For Competitive Racers Only: Complete the obstacle course with a 20-30 pound weight on your...

    La Salle, CO

    33.73 miles away

    I'm Attending

    CerusLuv 2020

    A 5K Obstacle Course Race with 25+ obstacles hosted by Cerus Fitness.  The course is designed to be fun and challenging for both recreational and competitive racers. CerusLuv was a finalist for best OCR in the world in 2019! For more rules/obstac...

    • 5K,

    Berthoud, CO

    22.0 miles away

    I'm Attending

    Berthoud Fall Family Fun Run/Walk

    This is a community event to benefit mental health and wellness of students in the Berthoud schools. Due to the COVID 19 situation, it will be a virtual event this year. You can complete the course on your own or register to support the schools. T...

    • 5K

    Highlands Ranch, CO

    35.41 miles away

    I'm Attending

    2020 HRCA OKTOBERFEST 5K- Presented by PDC Energy

    Due to Covid-19 THE RACE WILL BE CAPPED AT 250 PARTICIPANTS and in an effort to eliminate crowds, we ask that everyone abide by the below guidelines to keep our staff and our community safe and healthy and allow the races to continue to run in-per...

    • 5K

    Highlands Ranch, CO

    35.41 miles away

    I'm Attending

    2020 HRCA OKTOBERFEST 5K- Presented by PDC Energy

    Due to Covid-19 THE RACE WILL BE CAPPED AT 250 PARTICIPANTS and in an effort to eliminate crowds, we ask that everyone abide by the below guidelines to keep our staff and our community safe and healthy and allow the races to continue to run in-per...

    • 5K, , 10K

    Golden, CO

    17.97 miles away

    I'm Attending

    The Golden Gallop

    “Howdy Folks! Welcome to Golden, where the west RUNS!” On Sunday, September 20, 2020 Golden’s biggest annual race will take place for the 15th year running! Starting again beneath the City’s famous ‘Welcome’ arch, right in the center of historic ...

    • , 5K

    Denver, CO

    28.32 miles away

    I'm Attending

    Montbello ALIVE! 2020 5K Run/Walk

    The Virtual 5k Race/Walk will kick off the 2020 Montbello Alive! festivities. The 5k Race/Walk will launch on September 20th at 9:00am and close on September 25th at 9:00pm. Since this event is virtual, participants will have time to plan their ro...

    • 1/2M, , 5K, M

    Denver, CO

    28.69 miles away

    I'm Attending

    2020 Long Beach Marathon & Half Marathon

    Come experience one of the most scenic events in California, “Run Long Beach”. Starting in Downtown Long Beach, runners head towards the historic Queen Mary and then through Shoreline Village. After running next to the Pacific Ocean on the flat be...

    • 5K, 1/2M, , 10K

    Westminster, CO

    13.85 miles away

    I'm Attending

    Pioneer Prairie Dog Half, 10k & 5k

    The Westminster event supports Growing Home of Westminster.  Bring 5 items for donation on race day and you'll be entered into a raffle for great prizes!

    • 5K

    Denver, CO

    28.57 miles away

    I'm Attending

    Denver Sepsis Challenge

    Join us on September 26th for the 2nd annual Denver Sepsis Challenge! The Denver Sepsis Challenge will bring together sepsis awareness advocates all over the Denver area with a common goal of saving lives through raising awareness. September is S...

    • 5K

    Westminster, CO

    15.21 miles away

    I'm Attending

    Big Waves Family 5K

    Join us for a family friendly 5k at Lifetime Fitness at 8:30am!    

    Broomfield, CO

    13.46 miles away

    I'm Attending

    2020 Miner Gold Rush

    Prospect Ridge Academy is thrilled to present the 9th Annual Miner Gold Rush Virtual Challenge, a week-long event full of fun challenges including a 4-mile run, a 1-mile fun run, team challenges, and a spirit challenge! All proceeds will benefit P...

    Cenennial, CO

    32.84 miles away

    I'm Attending

    Colorado Coyotes Youth Cross Country Invitational

    Join us for the third annual Colorado Coyotes Cross Country Invitational. This meet is open to all youth runners between the ages of 6-14 years old. The course is a mix of mostly grass and crushed dirt rock with a few sidewalk crossings and a few ...

    • 5K, 1/2M

    Brighton, CO

    21.77 miles away

    I'm Attending

    Adams Half & 5k

    Join us for the Adams Half & 5k in September!  This race is chip timed. This year's event features both a 5k and 13.1 out and back course from Riverdale Regional Park along the Platte River Trail. Celebrate autumn with us, and join the Half M...

    • 5K, 1/2M

    Brighton, CO

    21.77 miles away

    I'm Attending

    Adams Half & 5k

    Join us for the Adams Half & 5k in September!  This race is chip timed. This year's event features both a 5k and 13.1 out and back course from Riverdale Regional Park along the Platte River Trail. Celebrate autumn with us, and join the Half M...

    • 5K,

    Lakewood, CO

    25.49 miles away

    I'm Attending

    The Great Trailhead Foot Race 10 Miler & 5k

    For 2020, we are limited to 175 racers (between both distances). Sign up before it's too late!  (there is not a youth/kid's race for 2020) Welcome to the Great Trailhead Foot Race at Bear Creek Lake Park!  Featuring legitimate TRAILS in the shado...

    • , 5K

    Littleton, CO

    31.08 miles away

    I'm Attending

    6 Dot Dash

    The 6 Dot Dash is an annual 5k produced by the National Federation of the Blind of Colorado to help raise funds for things such as braille literacy and blindness skills training. The National Federation of the Blind of Colorado works on local, sta...

    • 5K

    Any City, Any State, CO

    42.07 miles away

    I'm Attending

    Runway 5K - Run for the Angels

    RUNWAY 5K has gone VIRTUAL! A Benefit Run/Walk for Angel Flight West anywhere you choose! Like you, we're making changes in our lives during the COVID-19 outbreak and want you to know that we are acting with an abundance of care to make our env...

    • 5K

    Broomfield, CO

    10.69 miles away

    I'm Attending

    Runway 5K - Run for the Angels

    RUNWAY 5K has gone VIRTUAL! A Benefit Run/Walk for Angel Flight West anywhere you choose! Like you, we're making changes in our lives during the COVID-19 outbreak and want you to know that we are acting with an abundance of care to make our env...

    • 10K, 5K, 1/2M

    Louisville, CO

    7.96 miles away

    I'm Attending

    Louisville Trail Half Marathon, 10K, 5K event

    THE SUMMER SERIES FINALE The Annual ERS Finale... The 8th Annual Louisville Trail Half Marathon, 10K, 5K has been the Endurance Race Series' Summer finale and largest event the past 7 years... The course is a mostly flat with a beautiful, yet cha...

    • , 5K

    Arvada, CO

    15.89 miles away

    I'm Attending

    Just for J Superhero 5K

    CALLING ALL SUPERHEROES!! Just for J strives to raise funds and awareness for children facing medical challenges. We believe all of our honorary families and kids are real life SUPERHEROES and this year we are celebrating with a SUPERHERO 5K! Joi...

    • M, 1/2M

    Fort Collins, CO

    40.39 miles away

    I'm Attending

    The Long View Marathon

    Join us on a journey from Fort Collins to Loveland. The marathon begins at City Park in Fort Collins and ends at the Foote Lagoon in downtown Loveland. The half marathon starts at Fossil Creek Park and also ends in downtown Loveland. Along the way...

    • M, 1/2M

    Loveland, CO

    28.34 miles away

    I'm Attending

    Long View Marathon & Half

    Showcasing a unique city-to-city trail connection, The Long View Marathon and Half Marathon runs from Fort Collins to Loveland. Together, Gnar Runners and Sweetheart City Racing bring a unique collaboration to Colorado’s running scene in this one-...

    • 5K,

    Westminster, CO

    14.53 miles away

    I'm Attending

    It's Fall Y'all 5k (& K9 Canter 1 Mile Fun Run)

    AS OF APRIL 2020, ALL PRICE INCREASES HAVE BEEN FROZEN UNTIL JUNE 15, 2020 Celebrating all that is the wonderful season of Fall with two distances to choose from!!   We will have a 5k distance and a special K9 Canter 1 mile fun run!!  Think caram...

    • , 5K

    Westminster, CO

    14.52 miles away

    I'm Attending

    It's Fall Y'all 5k (& K9 Canter 1 Mile Fun Run)

    AS OF APRIL 2020, ALL PRICE INCREASES HAVE BEEN FROZEN UNTIL JUNE 15, 2020 Celebrating all that is the wonderful season of Fall with two distances to choose from!!   We will have a 5k distance and a special K9 Canter 1 mile fun run!!  Think caram...

    • 5K

    Denver, CO

    25.23 miles away

    I'm Attending

    Welcome Back Denver 5K - Denver Runs Again!

    Welcome Back to In-Person Running. We can’t wait to see you. Come celebrate with us as Denver Runs Again! Saturday, October 10th.  Price is $45 for in-person or virtual.  We’ll have four start groups with 175 people starting each hour. You choos...

    • 10K,

    Windsor, CO

    36.27 miles away

    I'm Attending

    Windsor Half Marathon & Heavy 10K

    Celebrating Windsor, Colorado with Windsor's first Half Marathon and Heavy 10K - featuring beautiful Colorado mountain views as you tour Windsor via roads, hills, dirt and paved trails. Participants will receive a mug, medal, chip-timing, buff, Hi...

    Morrison, CO

    24.33 miles away

    I'm Attending

    Run the Rocks

    / 1 RaceMobber Scheduled

    Run the Rocks was named one of the top 20 races to do in Colorado in 2020 by The Denver Post.  This year marks the 14th anniversary of the 5k,  10K  and 1.3 mile fun run/walk event hosted by the American Lung Association in the historic Red Rocks ...

    • , 5K

    Lakewood, CO

    25.49 miles away

    I'm Attending

    The Great Trailhead Foot Race 10 Miler & 5k (And YOUTH Race!)

    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...

    • 5K

    Fort Collins, CO

    41.38 miles away

    I'm Attending

    Run Fur Fun: Spooktacular

    Join us for our annual family- and dog-friendly 5K race, Run Fur Fun!  This event takes place in the fall at New Belgium Brewing Company and features a multi-species Halloween costume contest, plus race awards, breakfast, pet-friendly vendors and ...

    Loveland, CO

    29.48 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!

    Loveland, CO

    29.48 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!

    • M

    Fort Collins, CO

    40.88 miles away

    I'm Attending

    Blue Sky Trail Marathon

    Welcome to the Blue Sky Marathon, Fort Collins’ original and only trail marathon. Taking place on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space, the course takes you on a north-south tour of the easternmost ho...

    • 5K,

    Littleton, CO

    31.08 miles away

    I'm Attending

    6 Dot Dash

    The 6 Dot Dash is an annual 5k produced by the National Federation of the Blind of Colorado to help raise funds for things such as braille literacy and blindness skills training. The National Federation of the Blind of Colorado works on local, sta...

    • 5K, 1/2M,

    Denver, CO

    28.69 miles away

    I'm Attending

    2020 Golden Gate Half Marathon & 5K

    The Golden Gate Half is more than just a 13.1-mile run through San Francisco. Rather, it is a spectacular journey through this stunning City by the Bay. The chance to run across the Golden Gate Bridge is an experience unlike any other, but far fro...

    • 10K, , 5K

    Denver, CO

    24.16 miles away

    I'm Attending

    Spooky Sprint North Denver

    Join us for the annual Spooky Sprint, a Halloween-themed run that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), chip-timing, live results and awards, free photos, costume contest, free kids' dash, gre...

    • 1/2M, 5K

    Westminster, CO

    13.85 miles away

    I'm Attending

    Westy Half & 5k

    www.WestyHalf.com Join us for the Westy Half in October!  This race is chip timed. This year's event features an out and back course from Westminster Promenade Terrace to Standley Lake and back. Celebrate autumn with us, and join the Half Marath...

    • 5K, 10K,

    Denver, CO

    24.16 miles away

    I'm Attending

    Spooky Sprint South Denver

    Join us for the annual Spooky Sprint, a Halloween-themed run that is perfect for the whole family. The fun includes great swag (designer shirt, custom medal), chip-timing, live results and awards, free photos, costume contest, free kids' dash, gre...

    • 5K, 10K

    Denver, CO

    25.3 miles away

    I'm Attending

    Donut Dash

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

    • 5K

    Denver, CO

    25.3 miles away

    I'm Attending

    Donut Dash

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

    • 5K

    Greeley, CO

    35.12 miles away

    I'm Attending

    Steps for Stability - Live United 5K

    As a way to rally around a cause in our community, the United Way of Weld County (UWWC) is proud to host the fourth annual Live United 5K Run on Saturday, October 31, 2020. This year’s proceeds will benefit UWWC’s Housing Navigation Center (HNC) f...

    • , 5K

    Denver, CO

    29.75 miles away

    I'm Attending

    Fall Fest 5K in honor of Luke Morin

    The 2020 Fall Fest 5K is a virtual run/walk/ride in honor of Luke Wyatt Morin.  Luke was an active, articulate, and loving child.  He was always quick to offer hugs and snuggles.  He adored his big sister, Phebe, and loved playing with his Hot Whe...

    • 5K, , 10K

    Louisville, CO

    6.51 miles away

    I'm Attending

    Colorado 13er (Half Marathon/10k/5k)

    Join us in the 9th year of this exceptionally scenic, looped 13.1 course which runs through gorgeous  Louisville, Colorado! A half marathon is no joke! We designed this course so that you can enjoy all of the spectacular views of the Flatirons th...

    • , 10K, 5K

    Louisville, CO

    6.51 miles away

    I'm Attending

    Colorado 13er (Half Marathon/10k/5k)

    Join us in the 9th year of this exceptionally scenic, looped 13.1 course which runs through gorgeous  Louisville, Colorado! A half marathon is no joke! We designed this course so that you can enjoy all of the spectacular views of the Flatirons th...

    • 5K

    Denver, CO

    25.3 miles away

    I'm Attending

    City Park 5k

    Get ready for the impending holidays while enjoying a race with your friends at the City Park 5k! All participants will receive a comfy long sleeve hooded tee shirt, just in time for the cool fall temps!

    Loveland, CO

    29.48 miles away

    I'm Attending

    Bell Ringer 4 Miler

    Our community is one of the few remaining cities in the nation to follow the old tradition of ringing bells throughout the town in the early morning hours of Veteran’s Day. This race will mimic some of those old traditions to honor our nation's ve...

    Loveland, CO

    29.48 miles away

    I'm Attending

    Bell Ringer 4 Miler

    Our community is one of the few remaining cities in the nation to follow the old tradition of ringing bells throughout the town in the early morning hours of Veteran’s Day. This race will mimic some of those old traditions to honor our nation's ve...

    • 10K, 5K

    Denver, CO

    25.36 miles away

    I'm Attending

    Denver Veterans Day Run

    Sponsored by TOYOTA • Hosted by Colorado Veterans Project www.DenverVeteransDay.comThe 12th Annual Denver Veterans Day Run, on Sunday, November 7th, 2019, is a memorial 5K & 10K fun run starting at Denver's scenic City Park. Recognized as “De...

    • 10K, 5K

    Denver, CO

    25.36 miles away

    I'm Attending

    Denver Veterans Day Run

    Sponsored by TOYOTA • Hosted by Colorado Veterans Project www.DenverVeteransDay.comThe 12th Annual Denver Veterans Day Run, on Sunday, November 7th, 2019, is a memorial 5K & 10K fun run starting at Denver's scenic City Park. Recognized as “De...

    • 5K, 10K,

    Denver, CO

    25.3 miles away

    I'm Attending

    Pumpkin Pie 5K/10K

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

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