Hi Seattle Forest, Good question. The Challenge sponsors thought the url
www.nationalbikechallenge.org was easier to remember than
www.endomondo.com/campaign/national , but you do raise a good point about the redirect to Endomondo. They are also a partner in the National Bike Challenge, for more information on the Challenge, you can view a short YouTube video at
http://youtu.be/Ogup1v9cnzs. Thanks for your question and let me know if you have any other comments or questions.