HOUGHTON, MICHIGAN: Welcome to FasterSkier’s on-location coverage of the United States National Cross-Country Ski Championships from Houghton, Michigan. This week, Houghton hosts the U.S. National Cross-Country Championships on the Michigan Technological University’s trails system. Today’s event is the 20-kilometer classic mass start. There were several questions to be answered at the beginning of the day: the women’s side has been dominated by Hailey Swirbul. Swirbul has won the two previous races, the 10-kilometer individual start...