Leadville Race Series Run

The Leadville Race Series is a renowned endurance race series that takes place in the historic mining town of Leadville, Colorado. The full series includes prominent mountain biking and trail running events. Our focus here is Leadville Race Series Run (Trail Running Events).

Leadville Race Series Run is comprised of four iconic trail running races: the Leadville Trail Marathon & Heavy Half; Silver Rush 50 Run; Austin Rattler Run; the famed Leadville Trail 100 Run. All races attract elite athletes, seasoned ultrarunners, and enthusiastic amateurs seeking to challenge themselves in the rugged and picturesque Rocky Mountains (with the exception of the Austin Event).

The Leadville Trail 100 Run, often referred to as the “Race Across the Sky,” is one of the most demanding ultramarathons in the world. The race covers a grueling distance of 100 miles (160.9 kilometers) through the high-altitude terrain of the Colorado Rockies. The course takes runners along a mix of dirt roads, rocky trails, steep climbs, and breathtaking alpine scenery. With elevations ranging from 9,200 to 12,620 feet (2,804 to 3,847 meters), the race poses significant physical and mental challenges. Participants must navigate through mountain passes, endure extreme temperature changes, and battle the effects of altitude throughout the race. The event has strict cut-off times, adding an extra layer of difficulty and excitement to the already demanding race.

For those looking for a shorter but still formidable challenge, the Leadville Trail Marathon provides an exhilarating opportunity. The marathon course covers 26.2 miles (42.2 kilometers) of the same rugged terrain as the Leadville Trail 100 Run. Participants face steep ascents and descents, technical trails, and breathtaking views, all while breathing the thin air of the high-altitude environment. It’s an intense and rewarding race that attracts both experienced trail runners and those looking to test their limits in a stunning mountain setting.

Although not formal series events, the Leadville Trail 10K and the Leadville Trail 100 Run Camp provide opportunities to train, prepare and get a taste of the big event.  For those cross-over athletes who’d like to take on a special challenge, check out the “Lead Challenge,” arguably one of the toughest endurance challenges the world over.  The Challenge includes all four Leadville Trail Series Run events plus the famed Leadville Trail 100 MTB, the iconic culminating event in the Leadville Trail MTB Series.  You can also replace the Silver Rush 50 run with the Silver Rush 50 MTB if you choose.

The Leadville Race Series Run captures the spirit of endurance, perseverance, and adventure. It embodies the essence of trail running, showcasing the beauty of the natural landscape while pushing participants to their physical and mental limits. The races have become legendary among trail runners, creating a strong sense of community and camaraderie among participants who share a deep respect for the challenges and triumphs of these demanding events.

Whether you’re a seasoned ultrarunner seeking an epic test of endurance or an adventurous spirit looking to experience the magic of trail running in the mountains, the Leadville Race Series offers unforgettable events that celebrate the indomitable human spirit in the heart of Colorado’s rugged wilderness.

The Leadville Race Series is part of Life Time Events, a national producer of events spanning Running, Road, Gravel, and MTB cycling events.

Best Trail Running Events in the Rockies

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Leadville Trail Marathon & Heavy Half

Leadville, Colorado Leadville, CO, United States

The Leadville Trail Marathon and Heavy Half is arguably the nation's toughest and highest-altitude marathon.  The route takes trail runners through the historic mining district’s challenging trails to the highest point of any Leadville Race Series event: Mosquito Pass (13,185 feet). As you take on the toughest trails and thinnest air in all of endurance…

Leadville Trail 100 Run Camp

Leadville, Colorado Leadville, CO, United States

Leadville Trail 100 Run Camp is a perfect way to kick off the summer and practice for all trail running events in Leadville Race Series. This is truly an experience that is open to all runners and offers an introduction to the Leadville Trail 100 Run.   It is a long weekend of getting to know…

Silver Rush 50 Run

Leadville, Colorado Leadville, CO, United States

Silver Rush 50 is part of the Leadville Race Series, a unique high-altitude trail running event that is both a component of the LT100 Run Qualification system and a preparation race for anyone who has already qualified for the famed  Leadville Trail 100 Run. The team here at Strambecco considers the Silver Rush 50 to…

Leadville Trail 100 Run

Leadville, Colorado Leadville, CO, United States

The Leadville Race Series started with the Leadville Trail 100 Run, also known as "Race Across the Sky," one-hundred miles of extreme terrain that reaches 12,600 feet of elevation at Hope Pass. The course comprises forest trails and mountain roads through the Colorado Rockies and is held in San Isabel National Forest with a special…


Austin Rattler Run

Austin, Texas Austin, TX, United States

Hosted at the Reveille Peak Ranch in Austin, TX, the Austin Rattler Run is a Leadville Race Series event.   The course features a challenging and fun combination of terrain with gorgeous views of the Texas Hill Country. Offering 10k, 33k, or 66k race options focused around a 33k course, you can complete the 33k loop twice…

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