Colorado · Half Marathon · 5K · 10K
Colorado 13er (Half Marathon/10k/5k)
Colorado 13er (Half Marathon/10k/5k) is a half marathon, 5K and 10K event held in Louisville, Colorado. Its next confirmed date is Sunday, June 6, 2027. About 1,045 runners take part across all distances.
- Race day
- June 6, 2027
- Location
- Louisville, CO
- Field size
- ~1,045 runners
Race details
- Date
- Sunday, June 6, 2027
- Location
- Louisville, Colorado
- Distances
- Half Marathon, 5K, 10K
- Field size
- About 1,045 runners
- Registration
- runsignup.com
Registration, course & weather
- Registration status
- Open
- Start time
- 6:30 AM MDT
- Course profile
- Loop course; Road surface
About the Colorado 13er (Half Marathon/10k/5k)
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. ------------------------------------------- Join us for this exceptionally scenic, looped 13.1 course which runs through gorgeous Louisville, Colorado! We designed this c…
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Guides from the RaceRove blog
- 8 min read How to Choose the Best Half Marathon for a PR, Racecation or 50-State Challenge The best half marathon depends on what you want from it. How to choose a course for a personal record, a race worth travelling for, or an efficient stop on a 50-state challenge.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 9 min read How to Run a Race in All 50 States How to plan a 50-state running challenge: set your own rules, group states into trips, build a calendar around the seasons, budget for it and keep track of every finish.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Colorado 13er (Half Marathon/10k/5k): common questions
- When is the Colorado 13er (Half Marathon/10k/5k)?
- The next confirmed date is Sunday, June 6, 2027.
- Where is the Colorado 13er (Half Marathon/10k/5k) held?
- In Louisville, Colorado.
- What distances does the Colorado 13er (Half Marathon/10k/5k) offer?
- Half Marathon, 5K and 10K.
- How many people run the Colorado 13er (Half Marathon/10k/5k)?
- About 1,045 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Colorado 13er (Half Marathon/10k/5k)?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Colorado 13er (Half Marathon/10k/5k)?
- Yes — registration is open. Listed fee for the longest distance, $65 (from runsignup.com, checked October 6, 2026).
- What time does the Colorado 13er (Half Marathon/10k/5k) start?
- 6:30 AM MDT.
- What is the course like at the Colorado 13er (Half Marathon/10k/5k)?
- Loop course; Road surface.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.