Before this year’s mini-tour in Fort Kent, and even before the inaugural Tour de Ski in 2007, there was the Colorado International Spring Series (CISS) in 2004 and 2005. CISS was a stage race much like those coming into vogue today, and it was one of the first of its kind—if not the very first. Nathan Schultz, now the owner of Boulder Nordic Sport, had the idea for the event, and FasterSkier caught up with...