1. 
2. 
[syn: pathless, roadless, trackless, untracked, untrod, untrodden]
The Collaborative International Dictionary of English v.0.48:
Trackless \Track"less\, a.
   Having no track; marked by no footsteps; untrodden; as, a
   trackless desert.
   [1913 Webster]
         To climb the trackless mountain all unseen. --Byron.
   [1913 Webster] -- Track"less*ly, adv.-Track"less*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
trackless
    adj 1: having no tracks; "a trackless trolley"; "the trackless
           snowy meadow" [ant: tracked]
    2: lacking pathways; "trackless wilderness"; "roadless areas"
       [syn: pathless, roadless, trackless, untracked,
       untrod, untrodden]