Branding logo for Leadville Trail 100 Tun.

Leadville Trail 100 Run

The Leadville Trail 100 Run is one of the oldest, most storied endurance running events in the world — with not one, but two climbs on the crux of the course: Hope Pass (12,600 feet). Every year, a select handful of gritty, gutsy and determined runners make the pilgrimage to Cloud City to Race Across the Sky and take their shot at etching their name among the Leadville Legendary.

Branding logo for the Hardrock 100 trail race.

Hardrock 100

The Hardrock Hundred Mile Endurance Run is an ultramarathon of 102.5 miles in length, plus 33,197 feet of climb and 33,197 feet of descent for a total elevation change of 66,394 feet, at an average elevation of over 11,000 feet.

View of the finish line from the Comrades Marathon. Photo via

Comrades Marathon

The Comrades Marathon is the world’s largest and oldest ultramarathon race, which is run annually in South Africa between the cities of Durban and Pietermaritzburg.

Large letters WSER outside the expo for Western States 100.

Western States Endurance Run

The Western States 100-Mile Endurance Run is the world’s oldest 100 mile trail race. The Run starts in Olympic Valley, California, near the site of the 1960 Winter Olympics, and ends 100.2 miles later in Auburn, California.