There's a slight wind blowing, so any tracks are immediately filled up with sand (eolic processes)
Anyway, I doubt if that would be visible from so high.
@Kadri: no animation, it's for a 'coffeetable' book. And yes, these kind of commissions always give me the creeps, as there's no nice depth to be had and it's merely about processes that have to be shown. So I made a detailed look somewhere in them hills in B&W (they didn't have color film back then)
I might give them something like this as a bonus for the book (if they treat me well).