Join Clean Lakes Alliance for the inaugural Igloo Walk, a one-mile fun walk on the frozen Lake Mendota. The casual, snowshoes-optional trek will start and end at the Frozen Assets Festival and will feature a capitol-replica igloo and warm refreshments. Please register ahead for special family and group rates. Clean Lakes Alliance is a non-profit organization dedicated to the improvement and protection of the lakes, streams, and wetlands in the Yahara River watershed.