Grand Slam of Ultrarunning

The Grand Slam of Ultrarunning is a prestigious and challenging feat accomplished by only a few elite ultrarunners each year. It involves completing four of the oldest and toughest 100-mile trail races in the United States within a single year. The races included in the Grand Slam are:

  1. Western States 100-Mile Endurance Run: This is the oldest and most renowned ultramarathon in the world, held in California. The race takes participants through the Sierra Nevada Mountains, with a grueling terrain that includes steep climbs, rocky trails, and scorching heat.
  2. Vermont 100-Mile Endurance Run: Located in Vermont, this race showcases the picturesque beauty of the Green Mountains. Runners navigate rugged trails, dense forests, and challenging elevation changes. The course includes multiple river crossings, which adds to the difficulty.
  3. Leadville Trail 100-Mile Run: Held in the Colorado Rockies, this race is famous for its high altitude. Starting and finishing in the town of Leadville, the course reaches elevations over 12,000 feet (3,700 meters), testing runners’ endurance in thin air. The race includes steep climbs and descents through mountainous terrain.
  4. Wasatch Front 100-Mile Endurance Run: Set in Utah, this race takes participants through the stunning Wasatch Mountains. The course features a mix of technical trails, steep climbs, and breathtaking scenery. The race is known for its challenging climbs, including the notorious “Big Mountain” and “Snowbasin” sections.

To complete the Grand Slam, runners must finish all four races within the designated time frame, usually spanning from June to September. The demanding nature of these races, coupled with the short recovery time between events, makes it an extraordinary accomplishment in the ultrarunning community.

The Grand Slam of Ultrarunning requires not only exceptional physical fitness but also mental fortitude, strategic planning, and an unwavering commitment to enduring grueling conditions. Participants must overcome extreme fatigue, sleep deprivation, unpredictable weather, and relentless terrain to reach the finish line of each race.

Successfully completing the Grand Slam is regarded as a pinnacle achievement in ultrarunning, earning runners immense respect and recognition within the sport. It demonstrates remarkable endurance, perseverance, and a deep passion for challenging the limits of human performance in long-distance trail running.

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Event Series Grand Slam of Ultrarunning

Old Dominion 100

Woodstock, Virginia Woodstock, VA, United States

The Old Dominion Ultra is a 100-mile ultramarathon that takes place annually in the mountains of Virginia, USA. The event has a rich history dating back to 1979 when it was first founded by Pat and Wayne Botts and designed to allow East Coast runners to complete 100 miles on foot in 24 hours or…

Event Series Grand Slam of Ultrarunning

Western States 100

Olympic Valley, California Olympic Valley, CA, United States

The Western States 100 is an epic 100-mile trail run from Olympic Valley to Auburn, CA, in one day on the last weekend of June. It is the world's oldest 100 trail race, starting in 1974 as one of the ultimate endurance tests the world over. Over the course, runners will climb more than 18,000…

Event Series Grand Slam of Ultrarunning

Vermont 100 Endurance Race

Killington, Vermont Killington, VT, United States

The Vermont 100 Endurance Race is an annual premier ultra trail event in July and a Grand Slam of Ultrarunning event.  Racers can register for either the 100-mile or the 100-km race. Although the roots of the event go back to the 1960s, the endurance event as we know it today was established in 1989…

Event Series Grand Slam of Ultrarunning

Wasatch Front 100

Kaysville, Utah Kaysville, Utah, UT, United States

The Wasatch Front 100 also known as "100 miles of heaven and hell", is one of the most uniquely challenging ultrarunning events in the world. This prestigious 100 mile endurance run is the culminating event in the Grand Slam of Ultra-Running series. It is held in Utah the first Friday and Saturday after Labor Day…

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