Every now and then I hear somebody ask about the original mtm1 stock tracks.  I, myself, never saw them and really appreciated having a looksie at what I had missed.  This pod contains eight tracks.  They are:

Highlands Rally
A Crazy Eight
Canyon Adventure
Round and Round
Winding Way
Mud Pies
Arizona
Yucatan Adventure

I don't think you'll find that they are up to the mtm2 standard of track making but they do contain some really good layouts, some creative ideas, and you can definitely see the evolution of the game since these were made.  Also, you will probably recognize some of the names from the mtm2 update/remakes.  Now you can see where they came from.