The Collaborative International Dictionary of English v.0.48:
Pathless \Path"less\, a. Having no beaten path or way; untrodden; impenetrable; as, pathless woods. [1913 Webster] Trough the heavens' wide, pathless way. --Milton. [1913 Webster]WordNet (r) 3.0 (2006):
pathless adj 1: lacking pathways; "trackless wilderness"; "roadless areas" [syn: pathless, roadless, trackless, untracked, untrod, untrodden]