The average temperature in La Crosse, Wisconsin drops to around the freezing mark on December 5, and stays at or below 30 degrees through February and well into March.  In cold weather, children don't go outside and exercise like they do in the warmer months.  This contributes to increased inactivity and unhealthy behavior. The Tundra Trekkers is a walking/running project with the goal of getting kids trekking the entire year, including the cold winter months when Wisconsin temperatures really are equivalent to those found in the real tundra.  Tundra Trekker students exercise together as a group, a minimum of 4 out of 5 days a week during a 30 minute resource class held during school, and they are encouraged to keep their shoes/ipod on for after school activities and PE class.