The Amtrak Winter Park Resort ski train arrives in Winter Park, Colorado.

WINTER PARK, CO - MARCH 15: Conductor Robert Doney prepares to shut the train doors to depart Winter Park after droping off skiers and snowboarders riding the Amtrak Winter Park Resort Ski Train at Winter Park, Colorado on March 15, 2014. For the first time since 2009 the Amtrak Winter Park Resort Ski Train made two trips from Denver's Union Station to Winter Park Ski area. The two trips sold out in a matter of hours and officials at Amtrak hope to work out a way to have the ski train come back on an annual basis. (Photo By Helen H. Richardson/The Denver Post via Getty Images)