

About the event
The Leadville Heavy Half Marathon offers a challenge worthy of its name, taking place on June 28, 2025, in the thin air of Leadville, Colorado. Runners will traverse 15.46 miles of rugged trails and mining roads, ascending to 13,185 feet at the iconic Mosquito Pass. With 1,043 meters of elevation gain, this race pushes participants to embrace the steep climbs and sweeping descents that define the Leadville experience. For those seeking a taste of ultrarunning in the Rockies without the full marathon distance, the Heavy Half delivers an unforgettable test of strength and determination.
Date:
Sat
Jun 28
2025
Location:
Distance:
Elevation profile:
Hilly
Website:
LinkElevation gain:
Number of participants:
Find the best training plan for your goals and the distance you’re planning to run:
Stories from Runnas
Take your running to the next level
At 15.46 miles with an elevation gain of 1,043 meters, the Life Time Leadville Heavy Half Marathon is no ordinary half marathon. Scheduled for June 28, 2025, in Leadville, Colorado, the race takes runners to the towering heights of Mosquito Pass, where breathtaking scenery meets unrelenting climbs.
If you are an official race organiser with any questions about this page, please get in touch: races@runna.com
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