The day began in Trondheim with a centimeter of snow, which then transitioned to big blue skies for the thousands of fans attending the fifth stage of the Ski Tour 2020, a 1.5 k classic sprint. The Norwegians can throw a cross-country race party. The scene, despite the different setting, was reminiscent of the festive cowbell and camp-out sideshow of Holmenkollen’s Frognerseteren. It’s not quite the Yankee stadium of cross-country skiing, but a sign that in...