There's one in every RPG xD!
The Jade Sea of Guild Wars
Yes, it says sea, however its petrified and well: The sun tans/bronzes the many Luxon Colonies that thrive, live, traverse and mine there (In other words it's the large desert area in Factions campaign :3).
This is the music you get to hear when you're in the otherwise remote areas of the Jade Sea.
Also: Gromtull Desert Theme
Aint it neat?
It's kinda tricky for me to find Desert Tracks I like...