unpaved

From un- +‎ paved.

unpaved (not comparable)

1. (of a road or path) Not having a hard, impervious surface; not paved
   • 1856, Chambers's Papers for the People:

     Dr Baron Howard remarks, that in such quarters ‘whole streets are unpaved, and without drains or main-sewers; are worn into deep ruts and holes, in which water constantly stagnates; . . .