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Courtney Dauwalter
Courtney Dauwalter has won the sport's three most prestigious 100-mile races — Western States, the Ultra-Trail du Mont-Blanc, and the Hardrock 100 — all in the same calendar year on multiple occasions, an achievement widely regarded as one of the most dominant single-season stretches in ultrarunning history. Her victory at the 2017 Moab 240, in which she finished first overall by more than ten hours ahead of the second-place male finisher, became one of the sport's most widely discussed results and helped establish her broader reputation for a competitive toughness that transcended typical gender-based race performance gaps. Dauwalter's sustained dominance across wildly varying terrain and distances, from technical mountain courses to flatter, faster desert races, reflected an unusually complete skill set relative to ultrarunners who typically specialize in one specific type of course. Her combination of her unprecedented same-season sweep of the sport's three biggest 100-mile races and her genre-defining overall victories against male competitors has made Dauwalter widely regarded as the greatest ultrarunner competing today.
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Yiannis Kouros
Yiannis Kouros set more multi-day and ultra-distance running world records than any other athlete in history, earning the nickname "the running god" for a career of sustained superhuman endurance performances spanning distances from 100 miles up to multi-day races of over 1,000 kilometers. His performances at extreme multi-day races, including repeated victories and world records at the Sydney-to-Melbourne ultramarathon, a race covering more than 1,000 kilometers over multiple consecutive days with minimal sleep, demonstrated a level of sustained physical and psychological endurance almost without historical precedent. Kouros's numerous world records, many of which have stood for decades since he originally set them, reflect a level of individual dominance rare across any endurance sport, with several of his multi-day distance marks still unbroken more than 30 years after they were originally run. His combination of his unmatched collection of multi-day ultrarunning world records and their extraordinary decades-long durability has made Kouros almost universally regarded as the greatest ultra-distance runner in the sport's history.
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