Boulder marathon
9.27.26
COLORADO’S PREMIER FALL EVENT
A boutique marathon experience with big-city energy + amenities tucked away in the foothills of the Rockies
why
Bolderthon?
It’s Boulder.
Run through the endurance capital of the world — where Olympians train, mountains frame every mile, and fall turns the city into a postcard.
The Views
Big city energy, small-town charm. Picture mountain backdrops, city buzz, fall folfoahe in Colorado and an electric finish line at the foothills of the Rockies you’ll never forget.
This isn’t a course. It’s a highlight reel.
Lululemon for All
Every finisher gets an exclusive, limited-edition lululemon Metal Vent Long Sleeve. ($88 value. Yours to earn.)
Not swag. A statement piece.
Sustainable
Boulderthon firsts in sustainability and innovation firsts: First race with 100% hemp bibs in 5K 100% recycled medals Designed to be lighter on the planet — and bigger on impact
Good for you. Better for the planet.
Tech-Powered, Community-Designed
DESIGNED BY RUNNERS. POWERED BY TECH.
Personalized race insights. Smart tracking. Custom recaps. A community-designed medal you’ll actually keep.
Your race. Your data. Your story.
The Vibes
THE PARTY STARTS AT THE FINISH.
Epic after-party. Outdoor expo on Pearl Street in the heart of the city. Live music, brands, community, energy.
“Boulderthon has the best expo I’ve ever been to.” — Dakota
choose your
DISTANCE
Boulderthon is a top-rated marathon event in the United States, held annually in Boulder, Colorado. Recognized by Runner’s World, USA TODAY, and Active as one of the best and most beautiful races, it attracts runners from all 50 states and around the world.
2026
A RACE FOR
EVERY RUNNER
Every age. Every ability. Every reason to run.
Race day INCLUSIONS
Fuel
Precision Fuel & Hydration stations every two miles.
Energy
Live music and community-powered cheer zones throughout the course.
Connection
Near real-time runner tracking with mid-race audio cheers.
Celebrate
You crushed it. Get AI-powered race recaps and near real-time photos, powered by Laurel.
Testimonial
“Community events like Boulderthon offer a unique opportunity to enrich the lives of locals, and to invite more people from around the country and the world to see why we love our home here at the foot of the Flatirons,” said Boulder Mayor Aaron Brocket. “Local businesses see a boost, visitors leave feeling excited about their experience, and that creates benefits for our city that last a lifetime.”
Mayor Aaron Brockett
City of Boulder
John Tayer
Bobby Stuckey
Hayley Edmisten
Hayley Edmisten
RUN GREEN RACE STRONG
Sustainable race bib
90,000 cups saved from landfills
Infinitely recyclable hydration
EVENT DAY LOGISTICS
Bib pick up
- Boulderthon offers Early Bib Pickup (open to all) beginning Saturday, 9/20/25 through Thursday, 9/25/25 at 2pm at all Colorado Fleet Feet locations during their normal hours. Finisher Shirts will not be available at Early Bib Pickup. Participants who pick up their packet at Early Bib Pickup can pick up their race shirt after they complete their race on Sunday 9/28/25.
- Our Official Expo & Bib Pickup will take place on Pearl St Mall between Broadway & 15th, on Friday, 9/26/25, from 1pm-5pm, and Saturday, 9/27/25 from 10am-6pm and Sunday, 9/28/25 from 8am-2:30pm.
Getting here
This year, Boulderthon will once again feature its Start and Finish Downtown.
Our Start Village is hosted on the Pearl Street Mall, between Broadway and 15th.
The Start Line is at 21st and Pearl. The Finish is at 14th and Spruce.
Here are the best ways to get to the Start. For questions, please contact support@boulderthon.org
1. Take an Uber
Use Our Designated Uber Drop Off Lanes
Please enter address 1400 Walnut St, Boulder CO 80302 into Uber (the start of the Drop Off Lanes) to Uber to the Start Village Presented by Uber.
*Note- please use these lanes for all runner drop off.
2. FREE Parking!
Please reference our FREE Parking Garage Map.
Please note, these garages will fill up first and we suggest arriving at least 2 hours prior to the Start.
Where do I park?
All parking is FREE in Downtown Boulder on Sundays. See below for the best places to park!
Gear check
- Gear Check is available at the start
- Gear Check bags will be available at Gear Check
- We will transport anything you put in your Official Gear Check Bag to the Finish Area for you.
- Please plan for chilly weather! Colorado can be chilly in late September, with lows of 40 degrees in the morning. Plan on extra layers and check them into your Official Gear Check Bag.
Course support
- There will be port-a-potties on course. Please respect our community and utilize these for your needs.
Hydration
- Water & Hydration Stations will be staggered approximately every 3-4 miles. Specific locations on map to come.
Nutrition
- Precision Hydration, the Official Energy Gel of the 2025 Boulderthon, will be available at our pre-race fueling station before the race, and 3 additional stations on course. Please see maps for specific locations.
-
Precision energy gels are practical and efficient way to get 30g of carbohydrate into your system fast. PF 30 Energy Gel have a mild, neutral “Original” flavor to reduce flavour fatigue during longer efforts. The texture is designed to reduce stickiness in the mouth and minimize the need to wash them down with fluid immediately.
Medical
- A number of highly trained physicians, nurses, physical therapists and other medical personnel will be on hand throughout race weekend.
- There will be a number of mobile units moving throughout the course. These units will be staffed by paramedics, EMTs and marathon staff.
- There will also be ambulances stationed at the finish line and throughout the course.
After Party & Xcel Power-Up Cheer Spots
- Cheer runners on at the Finish! First 250 spectators will get cowbells. Join the fun at Spruce & 14th St, including our first-of-its-kind finish at the Pearl Street Mall!
- You can also cheer runners on throughout the course at any of our Hydration Stations!
- In addition, our Xcel Power-Up Cheer Stations information is coming soon!
- Our Official After Party will be at Avanti. Soak in the best views in town at their roof deck and celebrate your amazing accomplishment!
A PLACE LIKE NOWHERE ELSE
Feel on top of the world!
Boulder is a world-class destination offering 300 days of sunshine and endless recreation, shopping, dining, cultural and entertainment choices. It’s no wonder National Geographic named Boulder the Happiest City in America.
Run Boulder.
Run Boulderthon.
Join thousands of runners from across the country and around the world for a race experience that combines performance, beauty, and community.
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