Showing 113 events within 50 km in the next 365 days. Page 3 of 6.
Join Conservation Colorado for the second annual Rebel Run 5k! Run, walk or stroll to show your passion for Colorado's climate, air, land, water and communities. Create or join a team, or go solo – every dollar you donate or raise supports Conservation Colorado's efforts to protect the beautiful state we love and the communities who call it home. After the race, celebrate at our finish line party with food, drinks, sponsor booths and more. Sign up today to become a rebel and move for the cause! Stay tuned for registration opening.
Lace up your shoes and join us for the Demon Dash at its new course at the NAAC! We're excited to bring this course its new home and onto dirt! Whether you are a runner or walker, this will be a fun community event for all.
This year's race will follow the high school races at the Demons Invite, so make plans to come on out early to support them before you race. High school races start at 8:15am.
ON YOUR MARKS! GET SET!
GO BRONCOS!
Register to run in the 14th Broncos 7K presented by CommonSpirit, Ticketmaster, King Soopers, and Cigna.
2026 Race Route Highlights: Participants will start at Empower Field at Mile High to warm up with Denver Broncos Cheerleaders before heading west into the Sloan's Lake neighborhood. Racers will then head back to Empower Field at Mile High, through the tunnel, and onto the field to finish on the 50-yard line!
The Race begins on Sunday, September 6, at 8 a.m. Racers can pick up their race packet on either Saturday, September 5, or Sunday before the race. Free parking will be available at the stadium. Guests and spectators can cheer on the racers as they cross the finish line from designated viewing areas inside the stadium.
Plus, stay after the conclusion of the 7K for our Kids Fun Run and a new and improved Finisher Festival and Broncos Fan Rally, featuring Broncos Alumni, Miles the Mascot, Denver Broncos Cheerleaders, and more!
Limited Edition Shirt and Finishers Medal
All racers participating in the Broncos 7K will receive a limited-edition 2026 Broncos 7K race t-shirt and a 2026 Finishers medal. Both the medal and the shirt feature and celebrate the 25th anniversary of Empower Field.
If you've ever experienced fall in the Rocky Mountains you know what a magical time it is. With cool temperatures, sunny days, and stunning scenery, many people believe autumn is the best time to get out and enjoy the high country. And while a drive up through the mountains in the fall can be a nice way to spend a day, we think you should take it one step further. We think you should get out and experience it on foot!
The Flaming Foliage Relay takes the best parts of the old Outward Bound Relay route and throws in some new and scenic challenges. This relay begins in the quaint town of Idaho Springs and traverses 165 miles and three rugged mountain passes before finishing in charming Buena Vista on the banks of the Arkansas River. Along the way you'll run on roads and trails through some of the most amazing scenery Colorado has to offer. Join run.Colorado relays for the Flaming Foliage Relay Friday September 11th through Saturday September 12th, 2026.
This life changing relay road race is a team-oriented adventure with experiences and views you'll never forget. Each team consists of either twelve runners and two vehicles (the vast majority of the teams) or six runners and one vehicle (Ultra teams), or any other amount of runners including a solo unsanctioned race.
How to Register
Team Captains should be the first to sign up:
Submit team payment
Set up a team name and password and share with team members. Note: You can sign up a full team before you have secured commitments from all team members
Select team volunteer option
Once the Team Captain registers, they will share the team name and password with their teammates, so all teammates can register/join their team with no additional registration cost.
Choose your Volunteer Option
Fun Fact: This overnight relay race is made possible by over 130 volunteers on the course. Most volunteers are either friends/family of the race directors, team members running the event OR a local nonprofit raising awareness and funds for their cause or organization. Each team is given two options to help us make this event possible while giving back:
Option 1: Supply Volunteers: 10 person teams will supply two (2) volunteers; Ultra teams and High School teams will supply one (1) volunteer to staff the runner exchanges.
Option 2: Teams can choose to make a tax-deductible donation to Windsor Gives, 501(c)3 non-profit to support with providing volunteers for the relay.
10 Person Team Volunteer Fee: $300
Ultra Team Volunteer Fee: $200
High School Team Volunteer Fee: $100
**The Team Captain is the only one who chooses the teams volunteer option during the registration process and who pays the registration fees. Additional team members should have no fees at the end of their registration/joining the appropriate team.
IFRAME: https://www.youtube-nocookie.com/embed/eLMy2zVm93o?&wmode=opaque&rel=0
Come experience all that beautiful Nederland, CO has to offer at 8,236’!
Your participation directly supports TEENS, Inc. Providing opportunities through early childhood education, an alternative high school, job training, recreation and leadership development programs.
NedNed has been running for 44 years! Come and explore the best of trail running around Nederland. Our world class trails will inspire and challenge you as you take on the trail 10k or Half Marathon. Our road 5k is family (and pet) friendly and is a great way to see Nederland.
THE Denver 5k! Denver's Iconic Sloan Lake is the setting for the return of 'THE Denver 5k'. Celebrate with friends and family as you race around the lake in the shadow of Denver's skyline. Group pricing applies; youth and senior pricing are offered as well! Held at the start of September, THE Denver 5k is the perfect 'cool down' to the racing season!
Overall awards will be awarded based on gun time. All other awards (including age group awards) and rankings will (based on CHIP times.
Join us for the Elevations Credit Union Buffalo Bicycle Classic on Sunday, September 13, 2026! Choose from nine unique ride options designed for every type of cyclist. Our road courses range from moderate rolling routes to the challenging Epic climbs. For dirt‑lovers, our gravel courses offer everything from long, demanding mountain gravel to scenic mid‑distance routes. And for families and newer riders, the Little Buff provides a fun, easy ride on car‑free bike paths.
Ride Boulder Canyon on one of the Epic courses: If you’re riding the Epic, Epic 75, or starting the Gravel Epic, you’ll experience something truly special: westbound Boulder Canyon will be closed to vehicle traffic from 7–9 a.m. This is the one day all year when cyclists can enjoy this stunning canyon completely car‑free—an unforgettable perk reserved just for Buffalo Bicycle Classic riders.
Help Us Fund the Future: The Buffalo Bicycle Classic is more than a ride—it’s a fundraising event dedicated to supporting Colorado students through the BBC Scholarship Fund. This year marks our 24th anniversary, and our mission remains clear: help high‑achieving, high‑need students access a CU Boulder education.
Your registration supports scholarships—but you can make an even bigger impact by raising funds for BBC scholarships. As a part of ride registration, you have the option to become a fundraiser and collect awesome swag along the way. We will create a custom page and you can invite friends and family to contribute, and help open doors for more students. Every contribution fuels opportunity. Since 2003, the Buffalo Bicycle Classic has raised $4.3 million, helping 450+ students pursue their degrees. Your support ensures these scholars can focus on their education—not their tuition bills. Every registration counts. Every fundraiser amplifies the mission. Every dollar changes lives.
RIDE BIKES. CHANGE LIVES.
RUN AMONG THE PEAKS
⛰️Estes Park ⛰️ Georgetown to Idaho Springs ⛰️ Mt. Sneffels ⛰️ Ned Ned Trail Fest ⛰️Lead King Loop
We all love a Colorado original - and nothing feels quite like running at altitude (literally)!
Four of Colorado's most beloved half marathons, plus one unforgettable 25K, have joined forces with HAL Sports to create the Colorado Mountain Half+ Series!
This isn't just a series of races. It's an invitation to Run Among the Peaks! And what's more, the invitation is super flexible: sign up for any 3, 4, or ALL 5 events!
From breathtaking views to challenging climbs, each course showcases Colorado at its best - challenging, inspiring, and unforgettable. Some will take your best effort, but all of them will have you bragging about your success every chance you get!
What's more: every event in the series is proudly organized by nonprofits that support local youth programs, meaning every mile you run helps strengthen our communities and the next generation.
Why should you register for the Series?
~Because you're not afraid of a little altitude!
~Because you want to explore our beautiful State.
~Because collecting points at every race and chasing series awards sounds way more fun that sitting on the couch!
~AND because medals look way better at altitude.
12th Annual Nun Run
A Charity Race for Denver Sisters of Life!
Join us for a run like Nun other
on September 13, 2026
A 5K run and 1/2 marathon along the scenic High Line Canal, finishing in deKoevend Park. The 1-mile family walk takes place entirely within the park.
Do you support life at all stages from conception until natural death? Do you believe every human being should be treated with the utmost dignity and the respect they deserve? Do you want to see a Culture of Life spread in our country and our world? Then this is the race for you. The Sisters of Life are a religious order who live out this charism of joy and live to serve, protect, and enhance the sacredness of every human life.
The Start/Finish line will be located at deKoevend Park near Shelter B with race day festivities at and between Shelters B & C! Registration and bib pickup will be located near Shelter A - once you've registered/picked up your materials, please join us on the other side of the walking bridge for the festivities! We have the privilege of celebrating Mass in the park with the Sisters at 11AM! Please bring umbrellas, lawn chairs, and/or blankets for your comfort during Mass.
Join us to celebrate 12 years of supporting the Denver Sisters of Life!
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 10km race uses a handicap start system, slow-to-fast, spread over ~30 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.
All 5k racers will start ~15min after the first 10km starters.
Race Day Details
Time: 10k starts at 8:00 am + your handicap.*
5k starts approximately 15min after the first 10k starter.
Show up 30 minutes early to get your tag and warm up.
Location: Riverdale Ballfields, 9830 Riverdale Road, Thornton, Colorado, 80229
Course: Both distances are out-and-back on a mix of paved and smooth gravel.
Parking: Plenty of parking at the park.
The Tiger Prowl 5K is a fabulous annual community event and tradition run by the Lakewood High School Foundation to support all the talented and ambitious student programs offered.
All proceeds go back into Lakewood High School programs for the students including theater, musical performance groups, athletics and the many other LHS clubs. Donations to the general fund of activities or directed to one specific effort are encouraged. Each year 100% of registration fees have gone directly back to the school programs.
Race Web Site: http://www.tigerprowl5k.com/
The shirts are high-quality, athletic t-shirts! Participants must register by September 5th in order to receive a t-shirt. You can still register after Septembr 5th but will not receive a shirt.
The course travels on the well-shaded neighborhood roads in Lakewood. The race will be professionally chip timed by Colorado Race Timing, featuring state-of-the-art timing tags on the back of the bibs. Live results will be posted, and runners who register online can sign up for live texting/emailing of their race results.
Guaranteed T-Shirt Registration $30 by September 5th
Standard Registration $35 August 28th-Sept 5th
Late Registration $40, Sept 6th-15th
Race bib pick up is at Lakewood High School, West Atrium: Sept 18th and 19th 3-5 PM & Race Day Morning 7:30-8:45 AM
Online registration stays open even on Race Day. No need to register at the school, but please register before you come to pick up your race bib!
T-Shirts only for those registered by September 5th!!!
Please park in the Lakewood High School east or west parking lot.
Race Starts at 9 AM
** The Tiger Prowl is a yearly fundraiser. All funds are managed by the Lakewood High School Foundation, a 501(c)3 non-profit Colorado corporation. Donations are tax-deductible as a charitable donation to the extent provided by law.
The 9/11 Heroes Run 5K welcomes runners, ruckers, and walkers of all ages and fitness levels to honor the heroes of 9/11 and those who've served our nations since. We activate & unite communities and empower local veterans, active duty, first responders, and families of the fallen.
TMF is proud to partner with GORUCK again with rucking divisions at every run. Rucking is a sport based on special forces training in which participants walk or run while carrying weighted rucksacks. All participants registered for the GORUCK division will earn this year's exclusive TMF GORUCK patch. Learn more about GORUCK here.
One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with the Flatirons on the horizon will come into view. Its Endless Series sidekick in September is Beat the Heat.
The race benefits THE United States Marine Corps Memorial dedicated "to all Marines for all time" to "Honor Marines and remember all who serve". Lives are changed when veterans visit the Memorial - learn more on the web site at Https://USMCMemorialFoundation.org Funds help maintain flags, lights, and what we have until funds can be raised to remodel the memorial.
Race Location:
Colorado Tap House
14982 W 69th Ave, Arvada, CO 80007
Parking:
There will be specific parking for the race - follow the signs
Course:
This is a very simple 5K and trail is well marked. There are a couple of streets to cross and guards will assist with that.
Walking and kids are welcome…
Awards
Top 3 male and top 3 female runners
Top 3 male and female in following age brackets: 20 & Under, 21-30, 31-40, 41-50, 51-60, 61 & Over
Those who finish the race receive a collectible dog tag as they cross the finish line from a veteran volunteer!
A child's adventure begins with yours.
The Battle by the Brook Adventure Race
raises money to send kids to camp.
Join us for the
9th Annual YMCA Camp Shady Brook's
Battle by the Brook
September 19th, 2026.