Lake Michigan is the 3rd largest of the Great Lakes by surface area but the 2nd largest by water volume. It is the only Great Lake that is completely bordered by the United States of America. About 12 million people live along the shores of this lake.
Like most of the Great Lakes, Lake Michigan doesn't completely freeze in the winter, which drastically effects the weather in the region. The water in this lake has an unusual circulatory pattern and moves very slowly.
The sand dunes on the east shore of the lake are the largest fresh water dunes systems in the world and, in places, rise several hundred feet above sea level.
It is estimated that there are 1,500 shipwrecks at the bottom of this lake, which indicates that the lake is prone to dangerous weather. The shoreline also contains over 100 lighthouses.
Lake Michigan is 494km long and 190km across. If you choose this voyage, you will be challenged to run 380km (205 nautical miles) over the course of the month- the distance across the lake and then back again. That is an average of over 12km/day for the entire month.