The Dusts are a region of tropical Equus, located on (and in modern times often identified with) the Isle of Yore. They are characterized by their relatively arid climate and propensity for dust storms blowing across the desert hills and dry seabeds that dominate their terrain. The Dusts are marginally suitable for agriculture with irrigation, and sustain a population of ponies and other creatures.
The former seabed contains deep trenches. Crystal Forest growth is abundant in the Dusts, owing to the suitable climate and abundant sunshine. The Western Dusts have several notable settlements including the Edge, Trenchtown, and a Fungus Gnome village predating the Catastrophe. The Eastern Dusts are more densely populated and civilized. The Eastern and Western dusts are separated by the Dusty Mountains, which are overgrown by Crystal Forest and somewhat difficult to pass overland, although a road exists and is maintained with difficulty.
Besides being divided into the Eastern and Western regions, the Dusts could also be divided into abyssal, lowland, upland and mountain regions, by elevation. The lowlands and abyss were covered by ocean before the Catastrophe.