At Map My Run they have a superb website that allows you the user to map your runs anywhere in the world. The feature website uses google maps and a clever interface that allows you to measure your runs following accross wherever you want to run.
It will measure your run in kilometers or miles, it shows inclines declines, and you can even zoom in on the terrain that you are running to such a level that you can even see the roads markings on the roads you run on.
Before I decide on a run I use this to measure my perfect circuit, outback or even direct route.