Colorado 13er (Half Marathon/10k/5k)
- Date
- June 7, 2026
- Location
- 1200 Dillon Road, Louisville, CO
- Distance
- 13er · 10k · 5k
From the Organizer
The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race!
Seasoned runners and first-timers alike appreciate the excellent communication from the 13er race crew who make this event accessible for athletes of all levels.
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Join us for this exceptionally scenic, looped 13.1 course which runs through gorgeous Louisville, Colorado!
We designed this course so that you can enjoy all of the spectacular views of the Flatirons that Colorado has to offer. Come see for yourself!
Groups/Teams/Families: Save $5 per person for groups of 5 or more! See our FAQ page for more questions!
Click the drop-down menu under "race info" for all race details! Any questions, please email us at info@colorado13er.com
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Here's the good stuff!!
- 10 water station passes
- 5 port-a-john passes
- 9 miles of FLAT, crushed gravel
- nearby, free parking
- spectator friendly
- 13.1 finisher medal
- 10k or 5k options available
- iced towels at the finish line
- gender-specific performance tees for every registrant
- chip timed with texted results
- live, real-time results posted online
- 13.1 miles of million-dollar views AND
- the amazing sense of accomplishment you can only get from running 13.1! (or 5k or 10k!)
Distances & Pricing
Race Location
About This Sport
From Endurance Grid's Founder
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
The half marathon is the distance where you find out what you're actually made of. Long enough to demand real preparation. Short enough that it doesn't consume your life to train for it. Most people who run their first half describe it as the race that changed their relationship with what they're capable of. Once you cross this finish line, the bar moves. That's not a warning — that's the point.
Race day energy varies by event size, but the finish line feeling is the same regardless. Big races keep the noise going the whole way. Smaller races give you stretches where it's just you and the miles — and that solitude becomes its own kind of fuel.
The half marathon rewards people who show up for the boring training miles.
How long to train: 10–14 weeks. If you're already running consistently, 10 weeks of structured buildup is enough. If you're building from a casual base, give yourself 14.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
More running races in CO
Thursday May 21 - Ride Guides Only Practice Guide @ Palmer with Stacy
Flamingo Day 5K
5K
Rocky Mountain State Games - Swim / Run
All-Out Runapalooza
Frequently Asked Questions (FAQs)
- What is the Colorado 13er (Half Marathon/10k/5k)?
- Colorado 13er (Half Marathon/10k/5k) is a running event held in Louisville, CO. Learn more about the different endurance sports here.
- When and where is the Colorado 13er (Half Marathon/10k/5k)?
- Sunday, June 7, 2026 in Louisville, CO at 1200 Dillon Road, Louisville, CO. Check the official event page for exact start times and wave schedules.
- How do I register for the Colorado 13er (Half Marathon/10k/5k)?
- Registration is handled through their official registration page. Confirm pricing, distances available, and sign up there.
Colorado 13er (Half Marathon/10k/5k)
Jun 7, 2026