Definitions

1. adjective

having no tracks or marks to follow; untraceable

“The hikers got lost in the dense forest and their footprints were soon covered, leaving them trackless.”

2. adjective

lacking a track or trail, as of a vehicle or animal

“The expedition was forced to navigate through the trackless terrain with the aid of GPS.”

3. noun

a trackless area or region

“The wilderness area was a vast expanse of trackless territory.”