RaceMob

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.

    • 5K

    Thornton, CO

    19.45 miles away

    I'm Attending

    Lucky Dog Dash

    / 2 RaceMobbers Scheduled

    Lucky to be a dog owner?  Show your love with the Lucky Dog (Owner) Dash! This is a 5k Run with (or without) your lucky dog during the luckiest month of the year!  All the info you need to know about this race is on this website.  Click the menu ...

    • 1/2M, 10K, 5K

    Morrison, CO

    25.32 miles away

    I'm Attending

    Time to Paddy 5k/10k & Lucky 13.1 - Denver

    *Register by Sunday at midnight the weekend BEFORE the race to be guaranteed a shirt!Join us for the annual Time to Paddy 5k/10k and Lucky 13.1 Half Marathon! A St. Patrick-themed run that is perfect for the whole family. The fun includes great s...

    • 5K

    Littleton, CO

    29.66 miles away

    I'm Attending

    RMRR March 5th 9:00 am- 5K Johnson Lake by Clement Park

    Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area.  We provide a low-key, low-cost racing environment. Everyone is welcome to run with us! Our March race will be a run around Johnson Lake at Clement Park in Litt...

    • 5K, 10K

    Windsor, CO

    36.25 miles away

    I'm Attending

    Lucky Brew Race 5K, 10K, and 15K

    All participants will receive chip timing, photos, Lucky Brew Socks and a great after party, complete with beverages, food trucks and awards ceremony for top finishers. Starting and ending at Eastman Park, you'll love views of Longs Peak as you ru...

    • 5K

    Highlands Ranch, CO

    35.41 miles away

    I'm Attending

    HRCA St. Patrick's Day 5K

    Join the festivities at our St. Patrick's Day 5K starting on Dorchester Street in Highlands Ranch Town Center South at 9:00 a.m. on Saturday, March 16, 2024! Don your best Irish flair, round up your friends and family, lace up those running shoes,...

    Westminster, CO

    13.84 miles away

    I'm Attending

    Erin Go Bragh 7.77k

    Join us for the annual Erin Go Bragh 7.77k! This is THE LUCKIEST race on earth! There may not be a real pot of gold at the finish line of this happy-go-lucky fun run, but there WILL be UNLIMITED Lucky Charms, a Costume Contest, a Dance Party, and ...

    • 5K

    Denver, CO

    21.83 miles away

    I'm Attending

    CEC Early College 4th Annual Do Something Real 5K

    We are again hosting our annual Do Something Real 5K! The run/walk event is open to all CEC students, staff, families, and friends and will take place Saturday, March 16 at Sloans Lake at 8:30 AM. Check-in will start at 7:45 AM and the 5K will beg...

    • 10K, 1/2M, 5K

    Golden, CO

    14.03 miles away

    I'm Attending

    All-Out Spring Fever

    Join us for a St. Patty's Day run in the Denver area! We love St. Patrick's Day and sláinte. From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 12th annual Spring Fever from Jefferson County's NA...

    • 5K, 1/2M

    Wellington, CO

    49.55 miles away

    I'm Attending

    Spring Equinox

    Celebrate the 1st day of Spring with an early season race on scenic country roads.

    • 5K

    Denver, CO

    26.9 miles away

    I'm Attending

    Central Park 5k

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

    • 5K

    Lakewood, CO

    23.28 miles away

    I'm Attending

    The Ram Run 5K

    This is a community 5k that is a fundraiser for Green Mountain High School and GMHS Cross Country. This race will include 2 water aid stations that will be run by the GMHS Theatre department and GMHS Ram Band. At the end of the race, Coyote Table ...

    • 5K, 10K

    Buena Vista, CO

    3.18 miles away

    I'm Attending

    Most Eggcellent 10K, 5K, & Easter Egg Hunt

    10K & 5K:This is the Most Eggcellent of excellent races - an 80s themed 10K & 5k!  Bring out your pastel, your shoulder pads, your blue eyeshadow, and that big hair!  We cannot wait to see your spirit!  This run is stroller friendly!  The...

    • 5K, 10K

    Aurora, CO

    28.74 miles away

    I'm Attending

    Run for Donuts 5K/10K/13.1 DENVER

    Running for donuts is worth the pain. You'll get a run for donuts shirt to show off what you run for. For Premium packets, we'll be sure to send you some donuts/snacks! Overview:Run will sell-out QUICK! We will close off waves the moment they fil...

    • 1/2M, 10K, 5K

    Aurora, CO

    28.74 miles away

    I'm Attending

    Run for Coffee Lovers 5K/10K/13.1 DENVER

    For all the Coffee Lovers, this run is for you! You’ll love the shirt we send you and as a bonus, if you sign-up for the “Extras” package, we’ll send you some coffee to try! Overview:Run will sell-out QUICK! We will close off waves the moment the...

    • 1/2M

    Englewood, CO

    33.82 miles away

    I'm Attending

    Three Creeks Half Marathon

    Welcome to Denver's Best Spring Half Marathon! Saturday April 7, 2024 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...

    Denver, CO

    25.29 miles away

    I'm Attending

    RMRR April Trophy Series - 4 mile race at City Park

    April is a lovely time to run with RMRR, and the City Park 4 mile 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. Rac...

    • 1/2M, 5K, 10K

    Westminster, CO

    13.92 miles away

    I'm Attending

    All-Out Beat the Heat

    One of Colorado's favorite trails meets one of its most glorious parks at our 12th annual Beat the Heat! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with the Flatirons on the horizon will come into vi...

    • 1/2M, 5K, 10K

    Arvada, CO

    14.64 miles away

    I'm Attending

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

    Welcome to the SPRING FLING Prairie Dog Half (part of the Prairie Dog Half series)!  This spring-time event also features 10k & 5k distances! If you're looking for race day info (including, schedule, course, packet pick up, etc) navigate to t...

    • 1/2M, 21K

    Fort Collins, CO

    40.6 miles away

    I'm Attending

    Horsetooth Half Marathon

    Welcome to the 51st running of the Horsetooth Half Marathon. Your race will take you on a scenic point-to-point journey from the location of Hughes Stadium, the former home of the CSU Rams, to the finish line party at New Belgium Brewery. On the w...

    Denver, CO

    32.6 miles away

    I'm Attending

    Healthy Kids Running Series Spring 2024 - Denver, CO

    Who We Are: 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 d...

    Aurora, CO

    42.11 miles away

    I'm Attending

    Healthy Kids Running Series Spring 2024 - Aurora, CO

    Who We Are: 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 d...

    Longmont, CO

    13.79 miles away

    I'm Attending

    Boulder Track Series Meet 1

    We are pleased to offer 3 x Spring track meets (4/14, 4/28, 5/12), for middle distance and distance runners, that will be conducted similarly to the BMC (British Milers Club) meets. All meets will be held at Niwot High School. Our 3rd track meet, ...

    • 5K, 10K, 1/2M

    Westminster, CO

    17.46 miles away

    I'm Attending

    Time Travel Half-Marathon (and 5k/10k) - Denver

    Are you ready to have a roaring good time? Welcome to the ultimate prehistoric Time Travel adventure – the Prehistoric Park Theme: 5K, 10K, and Half Marathon! Gear up for a journey through time, where dinosaurs once ruled the Earth and now, they ...

    Fort Collins, CO

    37.23 miles away

    I'm Attending

    Healthy Kids Running Series Spring 2024 - Fort Collins, CO

    Who We Are: 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 d...

    • 5K, 1/2M, 10K

    Severance, CO

    40.72 miles away

    I'm Attending

    Great Western Trail Race

    Run or walk as we celebrate the opening of Northern Colorado's newest trail, connecting Windsor, Severance and Eaton! Choose a 5k, 10k or half marathon - with the inaugural Great Western Trail Race finisher shirt, music and custom locally made pri...

    • 5K

    Brighton, CO

    21.81 miles away

    I'm Attending

    2024 Five Star Fun Run, 5K, and Wellness Festival

    Adams 12 Five Star Schools is invested in the Whole School, Whole Community, Whole Child (WSCC) approach to education and is committed to ensuring that all students are safe, supported, healthy, engaged, and challenged. This event is an opportuni...

    • 5K

    Denver, CO

    28.57 miles away

    I'm Attending

    Unicorn 5k (Denver-East)

    / 4 RaceMobbers Scheduled

    Ready to gallop around Denver with some friends?  Yeah, you are!  Come frolic with us at the Unicorn Runner 5k at Great Lawn Park to kick off your spring running season!  You'll earn a sweet tee shirt and a flashy unicorn finisher medal! It's a 5...

    Denver, CO

    21.96 miles away

    I'm Attending

    The Mile High 4.20K Run/Walk

    A Mile Higher, A Mile Healthier                                                                                               Raise awareness and promote a healthy lifestyle with cannabis for medicinal purposes; physically, mentally, and psychol...

    • 5K

    Brighton, CO

    21.86 miles away

    I'm Attending

    Blue Heron Half & 5K

    Come run a PR in Adams County. Both races start/finish at Riverdale Regional Park, and run along gently flowing waters of the S. Platte, with wildlife, wildlife sculptures, and mountain views. Racers get tech running socks, finisher medals/glasses...

    • 10K, 5K, 1/2M

    Aurora, CO

    28.74 miles away

    I'm Attending

    SuperHeroes Run 5K/10K/13.1 DENVER

    Superheroes don't always wear capes but when they do, they run! Everyone is a superhero in their own way. From all the moms out there, to the front line workers, to even just those who are simply a friend to someone. So for every superhero out the...

    • M, 1/2M

    Brighton, CO

    21.77 miles away

    I'm Attending

    Runs With Scissors Races

    Saturday, April 27, 2024Half 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 22, 2024. If registration for a d...

    • 5K, 10K

    Aurora, CO

    28.74 miles away

    I'm Attending

    Arbor Day: Run for Earth DENVER

    Celebrate Arbor Day and Run for Earth! Every runner will get an Earth Stress ball after the run to de-stress and remind us of the Earth we live in under stress. But there's always something we can do. When you run, we'll also plant a tree at One T...

    • 5K

    Golden, CO

    16.09 miles away

    I'm Attending

    Fairmount 5k Pancake Fun Run

    The Fairmount 5k has been an essential fundraiser for almost 30 years at Fairmount Park.  This year, following the 5k run, walk and fun run we invite you to stay and visit with your friends while enjoying some music, a pancake breakfast and desser...

    Longmont, CO

    13.79 miles away

    I'm Attending

    Boulder Track Series Meet 2

    We are pleased to offer 3 x Spring track meets (4/14, 4/28, 5/12), for middle distance and distance runners, that will be conducted similarly to the BMC (British Milers Club) meets. All meets will be held at Niwot High School. Our 3rd track meet, ...

    • 5K

    Lakewood, CO

    22.17 miles away

    I'm Attending

    Federal Cup 5k

    DUE TO FACILITY SECURITY GUIDELINES, RACE REGISTRATION WILL CLOSE 2 DAYS PRIOR TO THE EVENT.  THERE WILL BE NO ONSITE/RACE DAY REGISTRATION. COME JOIN US FOR THE 2024 FEDERAL CUP 5K! This will 39th Running of the Federal Cup 5K. Each participant...

    • 5K

    Brighton, CO

    21.81 miles away

    I'm Attending

    Adams County Foster Care 5K Run/Walk and 1 mile fun run

    Adams County will host its tenth annual 5K race, and 1 mile fun run on Saturday, May 6th at the Riverdale Regional Park which is home to the Adams County Fair.  Registration opens at 6:45 a.m., and the 5k race starts at 7:30 a.m.  The Fun Run will...

    • 5K

    Highlands Ranch, CO

    36.92 miles away

    I'm Attending

    HRCA Mother's Day 5K

    The HRCA Mother's Day 5K is a family-friendly race taking place on Saturday, May 11, 2024. This course is suitable for participants of all levels, whether they are first-time 5K runners, elite athletes, kids, or parents with strollers. The event e...

    • 10K, 5K

    Littleton, CO

    31.16 miles away

    I'm Attending

    Colorado Friends of First Responders

    The Colorado Friends of First Responders (CFoFR) annual 10K Run 5K Run/walk Memorial Event is dedicated to the memory of those who lost their lives on the scene of an AirLife Denver medical helicopter crash that occurred in 1997. This event keeps ...

    Longmont, CO

    13.79 miles away

    I'm Attending

    Frank Shorter Track Classic

    The Frank Shorter Track Classic is a track meet honoring one of America's greatest ever distance athletes, Frank Shorter. Every year we will celebrate Frank's career, his devotion to the sport of running, and promotion of health and fitness, while...

    • 5K

    Denver, CO

    25.27 miles away

    I'm Attending

    Denver Mother's Day 5K

    / 1 RaceMobber Scheduled

    Looking for a fun and active way to celebrate Mother's Day this year? Look no further than the Denver Mother's Day 5K! This exciting event is perfect for runners and walkers of all levels and is a great opportunity to spend quality time with the s...

    • 10K, 5K

    Westminster, CO

    13.85 miles away

    I'm Attending

    Colorado Women's Classic - Westminster

    We are excited to return to Westminster for the 2024 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event!   We will run this event rain or shine! :) 

    • 10K, 5K

    Castle Rock, CO

    48.48 miles away

    I'm Attending

    Memorial Day Run & March: To Help Feed Homeless Veterans

    Special Forces Foundation is proud to announce the Annual Memorial Day Run & March. Be a part of the LARGEST food donation event in Colorado! In-Person Event: Saturday, May 18, 2024 at Douglas County High School If you unable to participate ...

    • 5K

    Windsor, CO

    37.6 miles away

    I'm Attending

    Guardian Games & Expo

    The Health4Heroes Guardian Games & Expo returns for its third year! Our Military and First Responder-inspired fitness competition is designed to test your grit while showcasing support for local heroes. This year, the games will be bigger and ...

    • 5K

    Arvada, CO

    14.03 miles away

    I'm Attending

    Miles for Smiles 5K

    This family friendly event begins and ends on the track at the North Area Athletic Complex (NAAC) in Arvada with a scenic trek along the Fairmount Trail in the middle. Following the 5K there is a 50-yard Jordyn's Adaptive Dash where children with ...

    • 5K

    Fort Collins, CO

    37.18 miles away

    I'm Attending

    Healing Warriors 3rd Annual 5K Fun Run

    The Healing Warriors 3rd Annual 5k Fun Run/Walk is a fun, family & pet friendly event held at the beautiful Spring Canyon Park. This professionally timed event is perfect for serious runners who may be looking to improve a time, or just have a...

    • M, 1/2M

    Eaton, CO

    45.72 miles away

    I'm Attending

    Weld Your Mettle Running Event

    We're bringing a new experience to Weld Your Mettle! Situated just east of Windsor, CO, we're spending the whole weekend running a 4 mile dirt loop in a private 146 acre field, with views of Longs Peak, and the serenity of Northern Colorado. With ...

    • 5K

    Fort Collins, CO

    35.96 miles away

    I'm Attending

    StepUp For Women And Recovery

    Step Up for Women and Recovery is an event that brings together the community and supports scholarships for women who seek treatment for drug and alcohol addiction. People entering a program often commit to complete treatment but may face financia...

    • 5K

    Littleton, CO

    31.08 miles away

    I'm Attending

    6 Dot Dash

    The National Federation of the Blind of Colorado 6 Dot Dash presented by Comcast is an annual 5k event to raise awareness and funds for the National Federation of the Blind of Colorado/Colorado Center for the Blind.  Your support helps provide Bra...

    • 5K

    Littleton, CO

    29.99 miles away

    I'm Attending

    Stepping Stone 5K

    Stepping Stone Support Center and Trailhead Community have come together to present this amazing event to benefit adults with developmental disabilities, raising both awareness and funds to give these participants a home of their own! Join us on J...

    • 5K, 10K

    Louisville, CO

    7.96 miles away

    I'm Attending

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

    The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race! Seasoned runners and first-timers alike appreciate the excellent communication f...

    • 5K

    Littleton, CO

    29.99 miles away

    I'm Attending

    Unicorn 5k & Festival (West)

    Ready to get off the sofa and gallop around LIttleton with some friends?  Yeah, you are!  Come frolic with us at the Unicorn Runner 5k at Clement Park to kick off your summer!  You'll earn a sweet tee shirt and a flashy unicorn finisher medal! It...

    • 1/2M, 10K, 5K

    Aurora, CO

    28.74 miles away

    I'm Attending

    Run Against Breast Cancer DENVER

    Stand together against cancer by taking part in a 5K, 10K, or 21K Half Marathon. After the run, get a special commemorative pin or ribbon to keep!A portion of run proceeds + 100% of the fundraising will go to American Cancer Society, the oldest an...

    • 10K, 5K

    Aurora, CO

    28.74 miles away

    I'm Attending

    Change the World Run DENVER

    Celebrate World Environment Day and Change the World! Every runner will get an Earth Stress ball after the run to de-stress and remind us of the Earth we live in under stress. But there's always something we can do. When you run, we'll also plant ...

    • 5K, 10K, 1/2M

    Arvada, CO

    16.66 miles away

    I'm Attending

    All-Out Summer Breeze

    / 2 RaceMobbers Scheduled

    From the heart of the West Metro area and the Stenger Soccer Complex, All-Out brings you our 12th annual Summer Breeze! Along with its Endless Series sidekick in January, Polar Prowl, these 5K, 10K and Half Marathon courses will follow Van Bibber ...

    • 5K

    Denver, CO

    21.98 miles away

    I'm Attending

    The Big Run 5K - A Global Running Day Celebration

    Join us for a 5K on June 9th at Sloan's Lake to celebrate Global Running Day! Celebrate what makes running fun — high-fives, endorphins, good friends. Come hang with Fleet Feet on Global Running Day, run a breezy 3.1 miles and make The Big Run an ...

    Littleton, CO

    35.54 miles away

    I'm Attending

    HRCA Happy Hour Half K

    Looking for something to do with the whole family on Father's Day Weekend? Look no further than the Happy Hour Half K on Friday, June 14th, starting at 6:00 p.m., at Civic Green Park in Highlands Ranch. Have you always wanted to run a half marath...

    • 5K

    Fort Lupton, CO

    24.67 miles away

    I'm Attending

    WineRun Denver at Salt & Acres

    Rest assured that you’ll have a fantastic time at WineRun, as our management team has extensive experience in the events industry. Our goal is to create enjoyable and one-of-a-kind experiences that bring friends and loved ones together.Whether you...

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