Zygmunt Staniak
Zygmunt Staniak voted up Joy Twain's answer

I looked on Trip Advisor and a few forums.  That really depends on how hard you push each day.  Exhaustion is your enemy.  Because of fatigue, you'll need to make several stops. 

Within the speed limit, 4-6 days.  I suggest you take your time and get out of the car to see a few things.  … Read more