I am a racetrack-forging-machine! I have a whole bunch of Mario Kart 64 remakes on my file share (featured by THFE, #49). If you are looking for tracks check HaloTracks.org , HaloCustoms.com , and ForgeHub.com . On HaloCustoms there is a host that has racing sessions pretty much every day, click on games at the tip and look for TomTris's Daily raceways.
yeah i play with a group of guys thats always downloading and playing race tracks, their pretty damn fun! --- as long as the game divides out to be around $1 or less an hour, the amount i spent on buying it is irrelevent.