View some of the best races in Boulder, Co! 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.
Kick off the holiday season with a spirited run/walk at Thornton's Carpenter Park. Choose from the chip-timed 5k, or experience the festive atmosphere in a shorter distance in our untimed Fun Run/Walk. Stick around after for the festival, includin...
Santa Catch 5K, 10K and 1 Mile Kids Fun RunSaturday December 14, 2024NOCO Sports Center - Windsor, CO Start your holiday season with the joy of running, with courses through the Highland Meadows neighborhood, and enjoy the warmth of the NOCO Sport...
Get into the holiday spirit with the Ugly Sweater 5K! Runners and walkers, young and old, are invited to join us at Washington Park in Denver for a flat, fast 5K. Dress in a tacky sweater – the more tinsel, bows, reindeer and candy canes, the bett...
Choose your distance! The Santa's Dash for Cash 1 Mile(ish) event is a celebration of Slo-Hi/Denver and EVERY finisher in BOTH the 1 Mile(ish) and 5k will get a bonus envelope! Some of the gift envelopes contain CA$H - at least one including...
A 5k race, run, walk & stroll through all of Estes Park's holiday lightsSuper cozy custom Fractel beanie (first 300 registered)Wearable Christmas lightsHot chocolate & cookiesHoliday themed course surprises Come experience the Estes Park l...
Join us for the annual Candy Cane Course 5k/12k! A fun, Christmas-themed event that is perfect for the whole family.The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live results and awards Free photos De...
Run out the old year, and welcome the new! One of Fort Collins’ oldest races, the Resolution Run, is back for its 41st year! Get a head start on your New Years Resolution by enjoying a family-friendly, neighborhood streets 5K starting & finish...
The Resolute Runner 5K is the KICK OFF PARTY OF THE YEAR! It's time to be RESOLUTE, to retroactively earn your pumpkin pie and chocolate truffles, and to start the new year on the right foot, literally! The course starts at Johnny Roberts Memorial...
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....
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....
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...
Join Peedy the Prairie Dog in Colorado every season for the Prairie Dog Race Series! Sign up for the distance of your choice - 5k, 10k or Half Marathon. Sign up for the season of your choice - Winter, Spring, Summer or Fall. Sign up for the city o...
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 ...
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....
Brave the Chill, Become a Legend Horsetooth Reservoir, Fort Collins, CO The Polar Bear Run & Plunge isn’t just an event – it’s a wild winter tradition for the bold and the brrr-ave! 🧊🏃♂️❄️ Registration Options: 5k Run/WalkPolar Plunge&...
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....
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....
Love 'em or Leave 'em Valentine's Day 5K and 10K Will you embrace the holiday full of heart or will you run from Cupid? Either way, you're going to LOVE this fun and festive workout with family and friends...oh, and those pancakes! Date: Feb...
Are you a Heart Throb? Grab your best running buddy and come on out to Johnny Roberts Memorial Park on the Saturday before Valentines Day. Celebrate the ability to get your heart pumping by cruising through this flat and fast 5k run (o...
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....
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...
Winter never disappoints us when racing in February in Highlands Ranch! You won't feel chilly after a course so hilly! After conquering the 5k, warm up with hot apple cider or hot cocoa at the finish line in your new FINISHER mug! Clic...
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 swag (designer shirt, custom medal), chip-timing, live results and awards, free photos,...
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...
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, some lucky Contests, a Dance Party, an...
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! ---------------------------------...
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...
Welcome to Denver's Best Spring Half Marathon! Sunday April 13, 2025 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, fast a...
Welcome to the 52nd 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...
Join the Academy of General Dentistry in the Fight Against Oral Cancer! Be part of a movement on April ___ at Denver's City Park for our 5K event dedicated to raising awareness about oral cancer. Oral cancer can affect any area of the mouth and is...
Run or walk as we celebrate Northern Colorado's newest trail, connecting Windsor, Severance and Eaton! Choose a 5k, 10k or half marathon - with a Great Western Trail Race finisher shirt, music and custom locally made prizes for top finishers.
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...
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...
A road half marathon & 5k in beautiful Estes Park, finishing downtown amidst the infamous Bigfoot Days Festival.Finish in Bond Park surrounded by live music, Bigfoot celebrities, and a FREE festival featuring 50+ vendors and booths.Once you'r...
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 m...
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...
Come join your daughter/student/friend/etc for this fun 2-Mile Fun Run! We have a new location and route!
Longmont's only Half Marathon - now offered in the cooler month of MAY! Join the Half Marathon or 5k distance! Walkers and Runners of all abilities welcome!
Please join us for the Annual Moose Mudder! This is a community event that will consist of an untimed 1k fun walk/run and a timed 5k followed by an optional muddy obstacle course. Get your best time, run for fun, walk with a group, form a stroller...
Muddy Dash is not your average mud run! Get ready for up to 3 Miles of messy mayhem. You and your friends/family can expect to run, walk, crawl, wade, slip, slide, and scream with excitement as Muddy Dash gets you fabulously filthy. We’...
The HRCA Mother's Day 5K is a family-friendly race taking place on Saturday, May 10, 2025. 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...
Question: Is it supposed to be DO NOT STOP, or DONUT STOP? Answer: YES! Like Running or Walking? Love Donuts? This race is for you! Join us for the annual DoNot Stop Half Marathon, 5k/10k! A donut-themed event th...
Whether you’re a seasoned runner or just love to walk and take in the scenery, Wicked Wine Run is for you! Each course will be held on beautiful properties or various partner vineyards across the country giving you a rare opportunity to view and t...
DescriptionWe are excited to return to Westminster for the 2025 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event! We will run this event rain or shine! :) This is THE race for ALL. THE. GOODIES.Th...
Gather your family and friends, including your furry friends—don't forget Fido! Grab your running (or walking) shoes and join us in supporting FOCP (Friends of Charlie's Place), the Clear Creek and Gilpin County Animal Shelter, and CCMRD Youth Pro...
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 ...
Join us for four days of running excitement! Whether you're tackling the timed events individually or teaming up for relays: 3, 6, 9, 12, or 24-hour formats, or taking on a 7K Run or Ruck, there's an event for everyone. Experience the thrill of fr...
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...
Join us at Denver's Sloan's Lake Park for a fun and festive 5K.
Get ready to rumble at the J-Town Jog 5K and Mile on Saturday, June 7, 2025, an annual family-friendly event to kick-off the Johnstown Barbeque Day! Runners and walkers of all ages and abilities will enjoy the scenic 5K route and 1 Mile...
Join us for our 13th annual Summer Breeze, at the Stenger Soccer Complex in the heart of the West Metro area! This event features the scenic Van Bibber Creek Trail winding west through Arvada's expansive open spaces, offering breathtaking views of...
Ready to get off the sofa and gallop around Thornton with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k in Thornton to kick off your summer! You'll earn a sweet tee shirt and a flashy unicorn finisher ...
Join us for the annual Hometown Half Marathon & 5k/10k! A run local-themed event that is perfect for the whole family.The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live results and awards Pacers for the ...
Dress up as your favorite American Hero! This could be your mom, dad, Albert Einstein, Batman, Superman, or the Powerpuff girls! This event is all about celebrating GREAT people who do and have done GREAT things! Come be GREAT with us! Sign ...
2024 Results Male Course Record: Cody Aldridge, 4:33.08, 2024 Female Course Record: Cora Goulet, 5:49.37, 2024 Master Male Record: Kyle Verrett Kiel, 4:49.10, 2024 Master Female Record: Kathryn Murphy, 6:27.38, 2024 Yooper Running Company p...
The Cookie Chase is Denver’s race that ends with cookies. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh cookies at the finish. Our mission is to bring people together to have a fun, fit morning. All finishe...
Get ready for a sun-soaked adventure and a fantastic mid-season challenge with our 13th Annual Dog Days 5K, 10K & Half Marathon, benefiting Do Over Dogs! Held in a central location between Denver and Boulder, our courses wind northeast along t...
Join us for the annual All American 4 & 8 mile! A patriotic-themed event that is perfect for the whole family.The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live results and awards Free photos FREE Ice C...
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