The Collaborative International Dictionary
Tracklessly
Trackless \Track"less\, a. Having no track; marked by no footsteps; untrodden; as, a trackless desert.
To climb the trackless mountain all unseen.
--Byron.
[1913 Webster] -- Track"less*ly, adv.- Track"less*ness, n.
Wiktionary
tracklessly
adv. Without a track.