If there’s one thing Denver does better than just about anywhere else, it’s earning our post-workout beers. From sunrise flows at Red Rocks to muddy mountain tracks down south, the Front Range calendar is packed all through summer and fall.
We rounded up the absolute best events happening around town so you can lock in your calendar, get your miles in, and soak up that late-season sunshine. A few RMFLEX members are already locked in for a couple of events in the fall, so keep an eye out for familiar faces at the starting lines.
Yoga on the Rocks at Red Rocks Amphitheatre
There’s nothing quite like a 7:00 AM wake-up call to sweat on the most famous monolithic stairs in the world. Yoga on the Rocks is a total Front Range rite of passage. You get the crisp morning air, incredible views of the foothills, and a massive community vibe. Just a heads up: these mornings sell out almost immediately, so if you miss the AXS drop, you’ll have to hunt for tickets on the resale market.
Where: Red Rocks Park and Amphitheatre, Morrison, CO
When: Saturdays, June through August 2026 at 7:00 AM
| Date | Studio | Instructor |
| June 27 | The River | Kendall Ashmore |
| July 11 | Better Buzz | Shanti Rodrigues (Bilingual) |
| July 18 | Better Buzz | Ashleigh Humphrey |
| July 25 | Rooted Heart | Kimberly (Kimmy) Hidalgo |
| August 1 | Better Buzz | Dina Paz (Bilingual) |
| August 8 | Better Buzz | Sarah Terranova |
| August 15 | Rooted Heart | Holly Hoops |
| August 29 | Rooted Heart | Rumika (Rumi) Choudhuri |
Buy Tickets: redrocksonline.com/yoga (Or check StubHub, SeatGeek, or Ticketmaster if dates are sold out on AXS)
Colorado Brewery Running Series
Because running just hits different when there’s a cold craft pour waiting for you at the finish line. Since 2012, the Colorado Brewery Running Series has been hosting 5K, 10K, and half-marathon events at local breweries across the Front Range and beyond. The Brewery Running Series hits local taprooms all over the state, turning 5Ks and 10Ks into backyard parties with live music and food trucks after the run. A portion of all proceeds goes directly to Colorado nonprofits, which makes that post-race patio beer taste even better.
Check out the local highlights below or see the full statewide roster at breweryrunningseries.com.
When & Where:
| Date | Event | Location |
| July 11, 2026 | Odell Brewing 5K | Fort Collins, CO |
| July 18, 2026 | WeldWerks Brewing 5K & 10K | Greeley, CO |
| July 26, 2026 | Bambei Brewing 5K | Superior, CO |
| August 1, 2026 | Colorado 150 Day 5K, Colorado Tap House | Arvada, CO |
| August 7, 2026 | 1876 Centennial Run (3.76K, 5K, 10K, 18.76K) | Snowmass Village, CO |
| September 6, 2026 | Wheat Ridge Half Marathon & 5K, Prost Brewing | Wheat Ridge, CO |
| September 12, 2026 | Totally Rad 80s 5K, New Image Brewing | Wheat Ridge, CO |
| September 13, 2026 | Cabin Creek Fall 5K | Georgetown, CO |
| September 19, 2026 | Run for the Home Team 5K, Waldschanke Ciders | Denver, CO |
| September 26, 2026 | Oktoberfest 5K at Prost Brewing | Northglenn, CO |
| October 4, 2026 | New Belgium Half Marathon & 5K | Fort Collins, CO |
| October 18, 2026 | Avery Fall 5K | Boulder, CO |
| October 25, 2026 | Five Alarm 5K & Chili Cook-Off at Bierstadt Lagerhaus | Denver, CO |
| October 31, 2026 | Boos & Brews Halloween 5K at Number 38 | Denver, CO |
Tough Mudder Colorado
If you’re looking to get out of Denver and test your grip strength, head south toward the Springs. Tough Mudder takes over Fort Carson for a weekend of heavy carries, massive obstacles, and a lot of mud. You can opt for the full 15K if you want the real challenge, or grab a crew from the gym for the 5K track. It’s way more about teamwork and surviving the terrain than hitting a specific pace, making it perfect for a gym crew looking to get out of their comfort zone.
Where: Fort Carson, 2700 Wilderness Road, Fort Carson, CO 80913
When: September 26, 2026
Register: https://toughmudder.com/events/colorado/
Boulderthon
For the pure runners looking for serious mountain backdrops without the brutal trail vert, Boulderthon is the big one. For its 6th year, the race is returning to its roots with a fast, scenic route right around the Reservoir before finishing directly in the heart of Downtown Boulder. They’ve completely re-engineered the course to cut out a massive chunk of the old elevation gain, making it the fastest and most scenic layout yet. It’s an incredible weekend to head up to Boulder, hit the course, and grab brunch on the bricks afterward.
Where: Downtown Boulder, CO
When: Sunday, September 27, 2026 at 7:00 AM
Distances: Marathon, Half Marathon, 10K, 5K, Kids Run
Register: http://boulderthon.org
Run the Rocks
The RMFLEX crew is taking on the iconic stairs and trails of Red Rocks for the 21st Annual Run the Rocks, and we want you on our team.
Now in its 21st year, Run the Rocks is a Denver classic. The race starts in the Upper North Lot at Red Rocks and benefits the American Lung Association. Every dollar raised fuels the American Lung Association in Colorado, powering research, advocacy, and education that saves lives in our community.
After the run, the party moves to the Plaza for live music, food, exhibitors, and free beer. It’s a great event to do as a group, so join the Rocky Mountain Flex team using the link below, or feel free to donate to the cause!
Where: Red Rocks Park and Amphitheatre, Morrison, CO
When: Sunday, October 11, 2026
Distances: Marathon, Half Marathon, 10K, 5K, Kids Run
- 9:00 AM: 5K Run/Walk
- 9:15 AM: 1.3-mile Run/Walk
- 10:00 AM: 21st Anniversary Party on the Plaza
Register to join the Rocky Mountain Flex team: https://runtherocks.lung.org/teams/12160
HYROX Denver
For the hybrid athletes who love heavy sleds as much as a fast mile, HYROX is coming to town. Denver’s first-ever HYROX fitness race takes place this November. The historic four-day event will be held at the Stockyards Event Center at the National Western Center. The format is a beast: eight 1-kilometer runs, with a grueling functional testing station between every single lap, including everything from heavy sled pushes and pulls to burpee broad jumps, rowing, and wall balls. The atmosphere inside the Stockyards Event Center will be loud, chaotic, and highly competitive. We’ve even heard that some of our Rocky Mountain Flex members will be showing out for the event!
Need additional training to help you get race-ready? Every Monday at 6:30 AM, we host a Hybrid Training Class on the turf with Coach Britt. Come by and take a class to dial in your strength and pacing as you train for HYROX.
Where: Stockyards Event Center, Denver, CO
When: November 12-15, 2026 (competition begins as early as 7:30 AM each day)
Register: https://hyrox.com/event/hyrox-denver
Mile High United Way Turkey Trot
You can’t call yourself a Denver runner until you’ve spent Thanksgiving morning doing laps around Wash Park. This tradition has been going strong for over half a century. It is beautifully chaotic, packed with dogs in custom bandanas, massive family groups, and people running in full turkey suits. It’s an awesome community event, a great way to earn your Thanksgiving dinner, and it now officially counts as a BOLDERBoulder qualifier if you’re trying to secure a fast wave for next year.
Where: Washington Park, 1700 E. Louisiana Ave., Denver, CO 80210
When: Thursday, November 26, 2026
- 9:00 AM: Wave 1
- 9:30 AM: Wave 2
- 10:00 AM: Wave 3
- 10:15 AM: Lil’ Gobbler 1-Mile Fun Run
Register: raceroster.com
Whatever you’re training for this season, the team at Rocky Mountain Flex is here to help you prep. Our personal trainers build custom programming around your specific goals and timeline to dial in your endurance, strength, and sport-specific conditioning.
Members get full access to all our classes, open gym, and the best gym community in Denver. If you’ve been thinking about joining, we have some great deals running all of July to celebrate America’s 250th birthday.
America turns 250, and we're celebrating all month long at RMFLEX!
$0 Initiation Fee — all month long — we’re waiving our $45 sign-up fee for any new member who signs up in July
$250 for a 6-Month Membership — save $235.99 off our regular price of $485.99 | new members only for the month of July
$2.50 Day Passes on July 4th, so bring a friend to drop in and celebrate with us | limited hours 7 AM – 2 PM that day only
Please note: Our waived sign-up fee and discounted 6-month membership are valid through July 31 and are only available to new members. Please see the front desk to get the discount.
Not yet a member? Sign up for our 7-Day Trial Pass and see what we’re about.
