Grand Slam of Ultrarunning
Old Dominion 100
Woodstock, Virginia Woodstock, VA, United StatesThe 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…
Western States 100
Olympic Valley, California Olympic Valley, CA, United StatesThe 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…
Vermont 100 Endurance Race
Killington, Vermont Killington, VT, United StatesVermont 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. This event was established in 1989 and is the only 100-miler with a concurrent horse race. The course winds through the Green Mountains with…
Wasatch Front 100
Kaysville, Utah Kaysville, Utah, UT, United StatesThe Wasatch Front 100 is one of the most uniquely challenging ultrarunning events in the world, a prestigious 100 Mile Endurance Run that 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 each year. The run stretches from East Mountain…