Thu, Jun 11, 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 13, 2026
🗺️ The Ironman 70.3 Boulder is a must-attend event for your triathlon calendar in the United States.
Triathlon
Sat, Jun 13, 2026
93.4 km from Tabernash5k 15k 30k 50k Half Marathon Ultra
Sat, Jun 13, 2026 at 7:00 AM
Join us for our 14th annual Summer Breeze, benefiting the Food Bank of the Rockies! This event features 5K, 10K, and Half Marathon courses that meander along the Van Bibber Creek Trail, offering
breathtaking views of Arvada's open spaces and Table Mountain. The courses are relatively flat, so prepare for a personal record! And continue your achievements with its endless series counterpart, Polar Prowl.
5k 10k 13.1 Miles Run Trail
Sat, Jun 13, 2026 at 7:00 AM
Every Registration Includes
Great Swag - designer shirt
Custom medal
Chip-timing with live results and awards
Free photos
Great snacks at the finish line!
Plenty of fun!
Grab your friends and family, you are not going to want to miss this one!
*Youth-based pricing for the 5k/10k, 12 & Under are only $17!
*Register by midnight on Thursday, two Thursdays before race day, to guarantee your shirt!
3.1 Miles 6.2 Miles 15k Run
Sat, Jun 13, 2026 at 7:30 AM
Waitlist Coming Soon
The Hundo (100K) or Hundito (64K) showcases the sweetest of Colorado singletrack at the beloved Buffalo Creek trail system. Finish at a gorgeous venue on private property, and
you have a dreamy cross-country MTB spectacular.
How to Sign Up
There are three ways to secure your spot:
Enter the Lottery – Your card will be automatically charged if you are selected on March 10. No charge if not.
Fundraise for Our Beneficiaries – Snag one of our 75 fundraiser entries and earn guaranteed entry while supporting a great cause
Volunteer – Support the Session Series or Hundo pre-race and bypass the lottery (limited to 40)
If you enter the lottery, you will have the option to create or join a Lottery Group. This ensures you won’t be separated from friends or family when selections are made. Please note: Lottery Groups are separate from race teams. Official race teams can be created after lottery selections are complete.
The Hundo proudly supports:
Colorado High School Cycling League
COMBA
Lucky Bikes
Even if you choose not to fundraise, add a little during the registration and give to the cause of kids, trails, and bikes - aces.
For full details on the lottery process, team entries, and selection timeline, please review our Lottery FAQs
E-Bikes are not allowed in the Hundo
64k 100k Cycling Mountain Biking Trail
Sat, Jun 13, 2026 at 8:00 AM
We look forward to welcoming everyone to KowTown Gravel on June 13, 2026. Please categorize yourself in the spirit of USA Cycling guidelines.
Our categories are:
Women
Men
Non-binary
E-bikes - allowed in the Cow and Calf course (will not be timed, no prizes)
We include age group rankings so that you can filter and compare your results more easily.
Good luck at KowTown!
16 Miles 28 Miles 54 Miles 88 Miles Cycling Gravel
Sat, Jun 13, 2026 at 8:00 AM
Are you ready to test your limits and honor our heroes?
Join us for the 5th Annual Health4Heroes Guardian Games, an electrifying Military and First Responder-inspired fitness competition like no
other! Returning Saturday, June 13th, 2026, at Loveland Sports Park from 8 AM to 3 PM, this year’s event is bigger, tougher, and more exciting than ever, with new challenges and opportunities to showcase your strength, resilience, and teamwork.
Athletes will compete in teams of two, navigating a gauntlet of high-intensity events designed to push them to their physical and mental limits. The competition culminates in a final race, where grit, strategy, and team cohesion are the keys to victory. Just like our nation’s top-performing Military and First Responders, success at the Guardian Games means leaning on your teammate and finding strength in unity—because you’re only as strong as your weakest link.
TAKE YOUR COMMITMENT TO THE NEXT LEVEL – FUNDRAISE FOR HEROES!
During registration, athletes can choose to become a fundraiser and waive the registration fee. We’ll provide a custom link to share with friends and family to raise vital funds for Health4Heroes. We make it easy—you just have to share it! A special prize awaits the biggest fundraiser.
Sign up now to secure your spot in the ultimate test of strength, endurance, and heart!
Sat, Jun 13, 2026 at 8:30 AM
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 June 13 at Clement Park for a 5K or a 2.5K Shortcut!
2.5k 5k Run Trail
Sat, Jun 13, 2026 at 8:30 AM
Jodi's Race for Awareness Saturday, June 13, 2026 7-9am: Survivor Breakfast 7:00am: Onsite Registration opens 7:00am: Expo, Family Fun Zone & Team Village open 8:00am: Survivor Photo behind the Pavilion 8:30am: 5K start 8:45am: 1-Mile start 9:45 am: Awards Ceremony Price shown on registration options include ALL taxes & fees.
Run
Sat, Jun 13, 2026 at 9:00 AM
Grab those tutus and come run with us to raise money for the Colorado Conservatory of Dance. This run/walk will be a party full of smile, music, and dancing! The 5K is a 3 loop course on a
combination of dirt trail and sidewalk at Broomfield County Commons Park. The course is on beautiful open space with mountain views. Bring the kids for the 1 mile fun run!
The Colorado Conservatory of Dance is a nonprofit organization in Broomfield Colorado. CCD has served over 9,000 people each year for more than 30 years through education, outreach, and performance.
CCD is a dance home to young and old and is a strong beautiful community.
The Tutu Dash has been organized to help reach our overall goal of $50,000 to assist with our move to your new studio space. Thank you for your willingness to support CCD so we can save our dance home.
1 Miles 5k Fun Run Run Trail Walk
Sun, Jun 14, 2026 at 8:30 AM
Back by popular demand, the 15th Annual Women Wheels and Wine brings together all levels of mountain bike enthusiasts who want to learn and/or grow their skills and knowledge baset. The day-long
event includes professional instruction, a catered lunch at Devil's Thumb Ranch Resort & Spa, a wine and cheese bike maintenance clinic, along with a good dose of fun and female camaraderie!
Call the Activities Center at (970)-726-8231 for more details and booking information.
Event details and schedule
Devils Thumb is proud to announce the 15th Annual Women's Mountain Biking Clinic on Sunday, June 14th, 2026
Women's Mountain Bike Clinic, from 8:30am-4pm
Schedule:
8:30 – 9:30 : Check-in at Registration area (Broad Axe Barn)
Pick up bike rental at the Activity Center in Zach’s Mercantile.
Participants will have access to the Locker Rooms all day
9:30 – 9.45 : Registration and Pre-ride information
10 - 12.00 Mountain Biking
Break into groups based on ability levels. Skills, drills, and ride DTR trails
12:15 – 1:30: Lunch in the Broad Axe Barn
1:30 – 3:00: Afternoon options
Additional mountain bike ride time
Afternoon Yoga
1:45pm - 2:45pm : Yoga at the Broad Axe Barn (yoga mats provided)
3:00 – 4:00 : Bike maintenance clinic with wine and cheese social hour at the Broad Axe Barn
Mountain Biking Trail
Sun, Jun 14, 2026 at 10:00 AM
Run the Race. Stay for the Party.
1.5 Miles 3.1 Miles 5.5 Miles 6.2 Miles Run
Tue, Jun 16, 2026
50.1 km from TabernashKids Run Trail
Tue, Jun 16, 2026 at 4:15 PM
63.4 km from TabernashCycling Mountain Biking Track
at 5:30 PM
Registration for the Summit Trail Running Series gets you into all 6 of our races around Summit County on a variety of amazing trails during the most beautiful time of the year here. From Dillon, to
B&B, to newly added Arapahoe Basin, get ready for some fun trails with stunning mountain views. The trail running races are every other Wednesday around 5:30 PM. More specific start times and distances for long course and short course will be posted for individual races. The series race dates are 5/17, 5/31, 6/14, 7/12, 8/2, and 8/23. Check out racebreck.com for more information on the series and individual races!
Event details and schedule
Run Trail
Every Saturday at 9:00 AM
parkrun is such a simple concept: turn up every Saturday and volunteer, walk, jog or run 5k.
5k parkrun Run Walk
at 5:30 PM
The Summit Mountain Challenge is a Mountain bike race series located in Summit County, Colorado. Take advantage of the various single track trails around Summit County, while competing against
others. We have courses and age categories depepdning on your skill level. Register for the entire series to receive 30%. Following each race, participants over the age of 21 will receive a beer. Do not miss out on this outdoor party that is disguised as a bike race!
Event details and schedule
Day-of registration will be available for $35 beginning at 4:00pm on race day at each trail head, along with bib pickup. We accept Cash, Checks and Credit Cards.
The category start times listed on our website are subject to change:
Mountain Biking Trail