Related terms:
comrades marathon
endurance run
london to brighton
fordyce
ultra marathon
day race
cliff young
trail run
road runners
youth day
mile endurance run
trail running
six day
road races
whitney portal
western states endurance run
mile race
goggins
kouros
Wikipedia sources:
Ultramarathon
Badwater Ultramarathon
Dean Karnazes
Scott Jurek
Multiday race
Comrades Marathon
Bruce Fordyce
Road running
Trail running
David Goggins
Yiannis Kouros
Context for words:
ultramarathon
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