Source : Webster's Revised Unabridged Dictionary (1913)

Pathfinder \Path"find`er\, n.
   One who discovers a way or path; one who explores untraversed
   regions.

         The cow is the true pathfinder and pathmaker. --J.
                                                  Burroughs.

Source : WordNet®

pathfinder
     n : someone who can find paths through unexplored territory
         [syn: {scout}, {guide}]