Hmmm, that's odd - Google Earth sometimes takes a moment to load on my computer, but I'm not sure why it wouldn't load. It does require a reasonably recent computer with plenty of memory. Older computers might not have the resources available to run it. If I try to run too many programs while Google Earth is running my system chokes and I have to shut google earth down.
To download the gpx run your mouse over the link, then right click and 'Save As...' . Remember where you put it for opening later...
If all else fails, I posted a
JPEG image of the route, but you can't do all the fun google earth stuff like pan, zoom, tilt etc...