Articles
Analysis built on the DUV results database. Every figure traces back to the data, and the caveats are in the piece rather than hidden.
The year Chinese ultrarunning stopped
Twenty-one runners died in Gansu in May 2021 and China suspended the sport. Five years on it has more finishers than it ever had, from fewer races.
Two countries, two completely different sports
America runs thousands of small ultras. France runs hundreds of enormous ones. Same word, and almost nothing else in common.
The countries where everyone runs ultras
America has more ultra races than anywhere. It is still nowhere near the top for how many people run them. France and Switzerland are in a different sport.
What a thousand metres of climb actually costs
Everyone knows hills cost you time. 21,000 trail races show how much: about 40 minutes per 1,000 m on gentle ground, and over two hours on steep.
What sub-24 does to a hundred-miler
A quarter of a million 100 mile finishes show a cliff at 24 hours that has nothing to do with cutoffs. Sub-24 changes how people race.