I had no idea so I dropped in a trip from Arizona to NYC. Check it out....lol
32 days 21 hours, 2,415 miles
Talk about some sore ass legs!! And I believe that is walking 24 hours a day, 7 days per week. I'm assuming this doesn't take into account stopping to rest, eat etc.
http://maps.google.com/maps?f=d&sour...,39.550781&z=5