Portland, Oregon to Portland, Maine

Once you have completed the sixth Challenge it is possible to move onto the seventh Challenge to cover the distance from Portland, Oregon, USA to Portland, Maine, USA, crossing the United States - 5000km or 500 Hours.   You can take part in any sporting activity. 
With the completion of this challenge along with Challenges 1-6 the total distance covered will be 20 Million Metres (20000km)