Bundle up and get out on Lake Superior to enjoy some early season sailing aboard the Hjørdis. While under sail the group may measure and record the temperatures of Lake Superior, discuss the Lake's effect on local weather patterns, and talk about how 'freeze up' and 'ice out' have historically affected shipping routes…or simply sit back, bundle up and enjoy plenty of laughs and beautiful scenery! Call for available dates and times. Sign up available starting May 1st each year. Polar Express express season ends in June.