Check out http://www.gpsvisualizer.com/ if you haven't already. I just discovered this site, GPS Visualizer and its a pretty impressive way to get your tracks,etc on Google Earth with add on functions.
I used the track lg from last years run from Goldstream to Fairbanks Creek Lodge, file attached as GPX if you want to check it out.
For you GPS nutes :)
Moderator: john