Showing 104 events within 50 km in the next 365 days. Page 1 of 6.
Sat, Jun 20, 2026 at 7:30 AM
Walk, run or ruck, a 5k, 10k or Half Marathon to celebrate the Red, White and Brew in Windsor, CO! Starting and ending at The Grainhouse at Hoedown Hill in Water Valley, this race has fun for the
whole family! Music, food, drinks, bouncy houses, face painting and more! Finishers will receive this year's RWB Headsweats Performance Hat and a chance at top finisher prizes. Kids Fun Run (1 Mile) also gets chip timing, race bibs and this years race shirt!
A portion of registration proceeds will go to Windsor Gives, 501(c)3 non-profit, to support Imagine Zero of Weld County, a 501(c)3 non-profit, a local community led coalition aimed at suicide prevention, education and awareness.
1 Miles 3.1 Miles 5k 6.2 Miles 10k 13.1 Miles Fun Run Half Marathon Run Walk
Sat, Jun 20, 2026 at 8:00 AM
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 medal!
It's a 5k distance for all, and whether you walk, trot, canter or gallop, we'll be happy to see you! This event also features a shorter saunter for those not quite ready to enjoy a full 5k! The untimed 3/4 mile run is long enough to get your heart rate up and be a 'real run' without being a sprint!
The Balloon Guy will be back this year- creating balloon creations for all!
Remember to refer your friends and you can earn back up to $20 back from your registration fee. Also - teams of 5 or more each get $5 off their registration. So form a group and get your buddies to join you today!
All the info you need about this event is found on this site - click the menu bar or scroll to the bottom to see a listing of all page links!
Denver Unicorn 5k - April
Highlands Ranch Unicorn 5k - August
1k 3.1 Miles 5k Run Walk
Sat, Jun 20, 2026 at 8:00 AM
Thank YOU for supporting this wonderful cause. Sierra's 5K Run/Walk entrees include: Official Race Bib, Official Long Sleeve cotton shirt with option for tech shirt, Chick Fil A entree (1st 750 to
register), DQ coupon, Free Beer at AKA (21 & up) & FREE Meningitis Vaccinations.
Sierra's Kids Fun Run: 10 & Under A FUN and very short distance. Kid's Bib, Short sleeve cotton shirt, Chick Fil A kids meal, DQ coupon, FREE meningitis vaccination.
3.1 Miles 5k Fun Run Run Walk
Sun, Jun 21, 2026 at 2:45 PM
The Solstice 100k Crit is looking to bring back the history and legacy of 100km criterium racing. Our aim is to introduce longer criteriums back to the front range of Colorado. We will be racing at
the familiar CSP venue but be ready for a different finish location and a fresh energy.
All races will be significantly longer so fuel accordingly and make sure to race with two bottles.
There will be three main groups of racing but scored separately within the race so racing for every place will make a difference.
The Solstice 100k will have high speed camera timing with quick results, live announcer, and event medical on site.
We hope you can add this to your racing calendar!
100k Criterium Cycling
Sun, Jun 21, 2026 at 7:30 AM
It's an annual Fathers Day tradition in Arvada! All are welcome - walkers, joggers and speed demons, too! Swag includes t-shirts for ALL participants! The Fun Run is an un-timed 1 mile out and back run/walk and the MANLY MILE is open to men and is a TIMED race!
1 Miles 5k 10k Fun Run Run Walk
Thu, Jun 25, 2026 at 4:30 PM
Fun for all, from newcomers of any age racing for the first time to veteran competitors looking to test their fitness, all in a friendly, welcoming environment.
We are back at CU Pott’s Field on a
brand new track!! This summer we are hosting four total events in June, July and August at CU Potts Field, Boulder. And this means we can run our full schedule of track events (including the Steeplechase on July 18), jumps, and throws!!
BRR Members Save $5 off adult pricing!
Use the email address associated with your membership. Non-Members can easily join in the registration process to immediately save.
3k Run
Sat, Jun 27, 2026
38.8 km from DaconoHalf Marathon Run Walk
Sat, Jun 27, 2026 at 7:00 AM
Loveland Lake to Lake Triathlon has welcomed athletes from Northern Colorado, this entire state, region, country, and outside the USA for 24 years and we are excited about our 2025 edition.
Athletes
have ONE OPPORTUNITY each summer to compete at this beautiful venue. Loveland CO~ one opportunity, one time each summer on a Saturday morning in June.
Lake to Lake Events is proudly known for striking the perfect balance between providing a very beginner-friendly experience where athletes who are new to the sport can ask the questions they need to feel comfortable and have a successful day (everyone from our staff to volunteers, our sponsors, and other athletes are willing to help) and at the same time attracting a high level of talent from outside the state as well as athletes from CU and CSU.
Racing for YOUR reason ~ whether you’re seeking an introduction to multi-sport, improvement upon your performance from the year past, competing for a slot at USAT Nationals (this is a USAT-sanctioned event), or coming out and competing with family and friends, we welcome all athletes to compete and improve at your level. An event known for its friendly local atmosphere, lovely venue, tremendous volunteer force, and a great race course.
No matter the athlete’s background, everyone will be able to relish in our friendly local atmosphere, incredible volunteer support, a scenic course, and a shady venue that makes spectating enjoyable for the whole family (even a playground for the kids!). Plus, you won’t find a better post-race meal anywhere else.
Triathlon
Sat, Jun 27, 2026 at 7:30 AM
The Denver Pride 5K is more than just a race—it's a powerful way for supporters of The Center on Colfax to make a difference in the lives of Colorado’s LGBTQ+ community. This event serves as a
crucial fundraiser, enabling us to provide free essential services, programs, and activities to LGBTQ+ individuals and our allies year-round.
Thanks to the incredible efforts of those who joined us in 2025, we raised over $240,000 to continue advancing our mission. Every dollar raised helps us strengthen and support our community, and we are deeply grateful for your dedication. We can't wait for you to run, walk, roll, or sashay with us in 2026!
3.1 Miles 5k Run Walk
Sat, Jun 27, 2026 at 5:00 PM
Join us for the 29th running of the Downtown Boulder Pearl Street Mile on Saturday June 27th, all taking place on the Pearl Street Mall.
It is a massive night of 1-Mile races on our criterium
multi-lapped course, that starts on Spruce St and 14th St. It completes 3.75 laps around the famous Boulder Court House and up the Pearl Street Mall. Famous Landmarks you will run past:
Boulderado Hotel - 1909
Boulder Theater - 1906
Boulder Court House - 1933
Pearl Street Mall - 1977
Races on offer:
5:00PM - Kids 800m
5:20PM - Family and Friends 1-Mile
5:40PM - 10min or slower
5:55PM - 9:00 - 9:59
6:10PM - 8:00 - 8:59
6:25PM - 7:00 - 7:59
6:40PM - 6:00 - 6:59
6:55PM - 5:00 - 5:59
7:10PM - High School Girls
7:25PM - High School Boys
7:35PM - Elite Masters Men and Women
7:50PM - Elite Women
8:00PM - Elite Men
With over 2000 spectators lining the course, and screaming their lungs out, what better way to spend your Saturday evening, than racing around Boulder's iconic land marks, and partying on the Pearl Street Mall with high energy racing and a pumping DJ!
Our FREE T-Shirt offer ends Sunday, May 17th at 11:59PM.
Baby strollers ARE allowed.
NO Dogs are permitted in the race.
There are NO race refunds.
1 Miles Run
Sat, Jul 04, 2026 at 7:00 AM
Celebrate the Fourth of July with run.Windsor in Greeley, Colorado as we bring back the annual July 4th Freedom 5k walk and run, along the Greeley Stampede 4th of July Parade Route! Participants will
start and finish on the route, just in time to also watch the parade as you kick off your Independence Day Celebration! This year's race proceeds benefit Beef Sticks for BackPacks, a local 501(c)(3) aimed at providing children in need with quality nutrition.
Packet Pickup - WeldWorks Brewery in Greeley - Friday, July 3rd from 3 - 6 pm
Race Day - Saturday, July 4th
Stay tuned for important race updates!
3.1 Miles 5k Run Walk
Sat, Jul 04, 2026 at 7:30 AM
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 up for a team and each member saves $5! (Registrations for the kids race do not count toward the team discount) See our FAQ page for how team pricing works!
5k 10k Run
Sat, Jul 04, 2026 at 7:50 AM
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 up for a team and each member saves $5! (Registrations for the kids race do not count toward the team discount) See our FAQ page for how team pricing works!
3.1 Miles 5k Run
Sat, Jul 04, 2026 at 8:00 AM
Join us for the 17th edition of the Avery Brewing Company 4K on the 4th, which is one of Boulder’s best running traditions to do on the 4th of July!
July 4th is celebrated in a number of different
ways, with parades, barbecues, sparklers and fireworks, BUT there has been no better way since 2008 to get your July 4th morning off to a great start, than doing Boulder’s traditional Avery Brewing Company 4K on the 4th.
It is run on a flat and fast course, then followed by the best post-race party with Avery Brewing Company beer, Savory Cuisines Catering breakfast burritos and live music!
July 4th, also known as “Independence Day”, is a National holiday to mark the historic date in 1776, when the Declaration of Independence was approved by the Continental Congress. So wear your red, white and blue on Friday July 4th, and come and celebrate Independence Day with us!
Our FREE T-Shirt offer ends Sunday, May 24th at 11:59PM.
Baby strollers ARE allowed.
NO Dogs are permitted in the race.
There are NO race refunds.
4k Run
Sat, Jul 04, 2026 at 8:00 AM
The LL5K, hosted by Sweetheart City Racing is scheduled to begin at Grimm Brothers Brewhouse on July 4th at 8:00 am. We welcome runners and walkers, and all abilities! We are proud to support
Health4Heroes with the 2024 Loveland Liberty 5K. Please check out their website using the link below. There is a cash purse for the top three males and females in the overall and masters divisions. The Elite corral/wave will start at 8:45m. If you can run a 5K under 24 min for men, under 26 min for women, sign up and run with the Elites.
Each participant 21 and over can receive a BOGO beer from Grimm Brothers Brewhouse. Finish line food will be breakfast burritos from El Cielo. Make sure you have your ID if you want an alcoholic beverage.
If you registered after the guaranteed shirt deadline, we will have any leftover shirts and past race shirts available AFTER the race. Volunteers will instruct you on how to get your shirt at packet pickup.
5k Run Walk
Thu, Jul 09, 2026 at 4:30 PM
NO Race Day Registrations
Fun for all, from newcomers of any age racing for the first time to veteran competitors looking to test their fitness, all in a friendly, welcoming environment.
We are back
at CU Potts Field again offering a full schedule of events.
BRR Members Save $5 off adult pricing!
Use the email address associated with your membership. Non-Members can easily join in the registration process to immediately save.
5k
Sat, Jul 11, 2026 at 7:00 AM
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 the scenic Big Dry Creek Trail. As you run, you’ll enjoy breathtaking views of the Flatirons on the horizon. Our trail is perfect for dogs, featuring a generous amount of soft surface along the 10K and half marathon routes. Plus, we have a special dog division to award the fastest pups at each distance and a dog-themed costume contest for extra fun! And continue the challenge by participating in the endless series counterpart, Fa La La, in December.
5k 10k 13.1 Miles Run Trail
Sat, Jul 11, 2026 at 8:00 AM
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 finishers will get a finishers medal, as well as top-notch chip timing, a race logo shirt and finish line expo with vendors and food and cookies!
5k Run Walk
Sun, Jul 12, 2026 at 8:00 AM
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 ~10 minutes. This gives everyone a chance to win. We'll use your estimated finish time to assign you a start time with others the same speed.
Race Day Details
Time: 8:00am. Show up 30 minutes early to get your bib and warm up!
Location: Stonehouse in Denver.
Course: The course on crusher/fine dirt
Parking: Stone House Park is at 2900 S. Estes St., between Yale and Hampden. From the intersection of Wadsworth and Yale, turn WEST on Yale, then SOUTH on Estes St. The park will be on your left a few blocks south of Yale. Registration will be under the picnic shelter. Parking is available at the park.
Stick around after for pancakes
2 Miles Run
Sun, Jul 19, 2026 at 8:00 AM
Sunday, July 19, 2026
The Donor Dash is a 5K run/walk to honor the lives of organ and tissue donors, celebrate the lives of organ and tissue recipients, and recognize those who continue to wait for a
lifesaving transplant.
We are excited to be at Washington Park for the 27th Annual Donor Dash on Sunday, July 19, 2026!
Ways to HONOR CELEBRATE & RECOGNIZE at Donor Dash:
THE DASHBOARD: As a participant, you can share a photo and a short message highlighting your reason for participating or your personal connection to donation and transplantation. These photos and messages will be displayed throughout race morning, honoring, celebrating, and recognizing the stories and inspiration behind our Donor Dash community. Learn more about the Dashboard here!
RIBBON CEREMONY: Please attend the on-stage program starting at 9:30 a.m. on race day to hear inspirational stories and recognize the different connections around organ, eye, and tissue donation. On race day, you can grab your ribbon near the finish line or at the ribbon tent near the expo area. The ribbon connection colors are below.
Run