I use www.mapmyrun.com to keep track of all my running. It's kind of my self-motivation, looking back and seeing what I've accomplished. One of the things that the website does is keep track of your totals and flash them on the screen. So far, since I started keeping track (August 2009) I've run over 3,000 miles.
I've run across the USA. That's a hell of a jog.