In Rossland, British Colombia, most residents can reach the town’s lone alpine hill by car in five minutes, the cross-country trails in seven. Tucked high in the Monashee Mountains, hemlock and fir outnumber some 3,500 locals, most of whom know each other by name. And over the past two decades, Rossland, which was fourth in the juvenile boy’s classic sprint. “That sat heavily with me all summer because I knew, I believed that I was capable of being...