WEISSENSEE, Austria — The Elfstedentocht is a legendary Dutch speed skating race and a victim of global warming: it hasn't been held in 22 years; the longest such period since its inception. Since 1989, organizers have held an "Alternative Elfstedentocht" race in Weissensee, Austria, where the ice is reliably thick enough to skate the grueling, 200km tour. Photographed for The New York Times