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.
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....
Did you know that upwards of 100 Bald Eagles winter at Barr Lake? Join us to see this spectacle and observe these resilient birds. We’re hosting three opportunities to get out and learn about the eagles that spend the winter at Barr Lake State Par...
Rocky Mountain Road Runners holds a monthly series of timed races in the Denver area. We provide a low-key, low-cost running environment. The Trophy Series races use a handicap start and scoring system. The slowest 11km racers will start at ...
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...
This event features Freestyle Cross country Ski Race that is a qualifying race for the Nordic Series, Classic Cross country Ski Races, and Snowshoe races! Enjoy a variety of events for all ages and abilities. The race course includes part 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...
The Bacon Strip race is back again! Take your pick between the Bacon Strip (10 miles) or Bacon Bits (4 miles). Once again, this race is part of the FCRC/Horesetooth Half Marathon/RU training program. The races are free for FCRC members. There is a...
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,...
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 ...
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 15, 2025! Don your best Irish flair, round up your friends and family, lace up those running shoes,...
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...
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...
Denver Athletics brings you the 2025 Denver Park Circuit Series- Three races at Denver's iconic city parks with the same format: One Lap As Fast As You Can Go! Spring- The City Park Circuit Summer- The Cheesman Park Circuit Fall- The W...
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...
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 wel...
Denver Athletics is collaborating with our friends at Good Boys Running Club to bring you a distance-based all-comers track meet under the lights of Randy Penn Stadium. The event will feature 5 events from 400-3200 as well as a 4x400 relay with mu...
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, 2025. 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...
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 opportunit...
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!
All participants are welcome. Come challenge yourself to be the best. Bring a friend to keep you company. Bring your little ones and get a better workout pushing a stroller. You can even bring your for-legged friends (with a leash of course). ...
Rocky Mountain Road Runners holds a monthly Trophy Series race in the Denver area. Our May race will run at Denver's Central Park. We have both 5mi and 5km courses. The 5mi uses our handicap start system, slow-to-fast, spread out over ~26 minutes....
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...
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area. We provide a low-key, low-cost racing environment. Everyone is welcome to run with us! The race uses a handicap start system, slow-to-fast, spread over ~13 minutes...
Join us at Denver's Sloan's Lake Park for a fun and festive 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 communicat...
StepUp 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 financial...
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 ...
If you’ve done a traditional 5K, you know they can be a bit lackluster. But the BUBBLE RUN™ is like running through Willy Wonkas’ factory. Clad in white t-shirts, adults, kids and strollers run, walk, dance and play across up to 3 mil...
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