
Louisville, United States of America · Monday 7 June 2027
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 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 ------------------------------------------- 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!)
Adjusted Time
1:48:59
Time difference: +4.0 minutes compared to a flat, road, temperate course.
We don't yet have verified elevation data for this course, so we can't rate its difficulty against other half marathons. Our data pipeline backfills course elevation continuously - check back soon.
Colorado 13er (Half Marathon/10k/5k) is a half marathon held in Louisville, United States of America. It is scheduled for Monday 7 June 2027. The course is run on road surface with 0m of total climbing, with its high point near 0m above sea level. For registration and full race details, visit the official Colorado 13er (Half Marathon/10k/5k) website.
This is a very flat course, with only 0m of total climbing and little change in altitude throughout. Flat profiles let you hold an even pace from start to finish, which makes this a fast, PB-friendly race.
Based on historical weather data for June, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 21°C and 32°C. Heat is one of the biggest performance factors in distance running - for every degree above 15°C, finish times can slow by roughly 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (8%), so dry conditions are likely.
Colorado 13er (Half Marathon/10k/5k) is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Colorado 13er (Half Marathon/10k/5k) against other half marathons to find the right race for your goals.
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