Not sure where you are looking for:

Mapsource has 2 options to make tracks: with way points which follows the roads and real gpx which can go everywhere and you have to follow the road yourself. The latter creates a track which is independent of the map.

You can also use a route planner based on OSM: http://www.yournavigation.org/ this does not always work good when the route is too long and if the map has inconsistencies (my last try from The NetherLands to Italy led me via Antarctica :frowning: )

And last but not least you can use uploaded traces by using: http://www.openstreetmap.org/traces/tag/xxxx, where xxxx is a tag which related to the location you are looking for. Helps only if the same has been traced before and is therefore not reliable.