'Trackless' definitions:

Definition of 'trackless'

adjective

Having no tracks; "a trackless trolley"; "the trackless snowy meadow" [ant: tracked]

adjective

Lacking pathways; "trackless wilderness"; "roadless areas" [syn: pathless, roadless, trackless, untracked, untrod, untrodden]

From: GCIDE

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]