The Upperways, sometimes called the "Upperdark", were a Deepways realm that ended 3 miles below the surface of the Head of the Greatwyrm and other "Upper Worlds". The Upperways were the places where surface dwellers and denizens of the Deepways most often met, through noted Underdark entrances or by gaps or fissures in the land.
Due to this mixing, the Upperways were sometimes considered dangerous by inhabitants of the Middleways, but only due to the variety of creatures that were encountered; in truth, none were nearly as dangerous as what laid in the Lowerways.