In recent times, the Stowe Derby has been like the Winter Olympics —held once every few years. It’s supposed to be annual, but bad weather has conspired to delay or cancel the Derby several times. The Derby is uniquely Stowe’s — a race from the top of Mount Mansfield to Stowe village, using just one pair of skis. It was born as a challenge in 1945 between the head of the ski school and a famous mountaineer. The ski school guy, Sepp Ruschp, won the first two Derbies on his alpine gear, but Nordic skis now rule — when there’s enough snow to run the race.