Embark on an extraordinary challenge in the heart of the Rocky Mountains at the Leadville Trail Marathon and Heavy Half on June 27, 2026, in Leadville, Colorado. Known as "the nation's toughest marathon," this iconic event tests your grit and determination across 26.2M or 15M of rugged, high-altitude terrain. The course, primarily composed of dirt roads and single-track trails through Leadville's historic mining district, offers breathtaking scenery and panoramic views that will leave you both breathless and inspired. You'll navigate an out-and-back route, with the marathon summiting the notorious Mosquito Pass at a staggering 13,185 feet – the highest continuous pass in the country and the highest trail marathon in the USA. Prepare for significant elevation gain, totaling around 6,000 feet for the marathon, where even seasoned runners often find themselves power hiking the steepest ascents.

Participants consistently praise the Leadville Trail Marathon for its challenging yet rewarding experience and well-organized atmosphere. Starting at 8:00 AM in front of the Sixth Street Gym, the course is meticulously marked with fluorescent pink-and-black striped ribbon and flour arrows. Along the way, seven well-supplied aid stations for marathoners (three for the Heavy Half) offer essential hydration and nutrition, including water, energy gels, high-carbohydrate beverage mixes, and an assortment of snacks like bananas, pretzels, and chips. Typical race day conditions in late June bring average highs around 71°F and lows around 37°F, with a low 4% chance of precipitation, though runners should be prepared for potential snow at higher elevations.

Beyond the personal accomplishment, the Leadville Trail Marathon holds special significance as a qualifier for the legendary Leadville Trail 100 Run, offering a minimum of 35 coveted "LT100" coins for marathon finishers. This event, part of the storied Leadville Race Series, is celebrated for its unique challenge of thin air and relentless climbs, providing an unforgettable "Race Across the Sky" experience that many describe as a gateway to ultrarunning. Finishers are awarded a medal and a commemorative coffee mug, serving as a testament to their extraordinary achievement in this truly one-of-a-kind mountain race.