1. Having no tracks
   "a trackless trolley"; "the trackless snowy meadow" 
2. Lacking pathways
   "trackless wilderness"
   - pathless, roadless, untracked, untrod, untrodden

See also: inaccessible, unaccessible

Antonym: tracked

• unshapely
• unshapen
• unshared
• unsharpened
• unshaved
• unshaven
• unsheared
• unsheathe
• unsheathed
• unshelled
• unshielded
• unship
• unshockable
• unshod
• unshoed
• unshorn
• unshrinkable
• unshrinking
• unshuttered
• unsighted
• unsightliness
• unsightly
• unsigned
• unsilenced
• unsimilarity