However, you could consider these words or phrases, depending on the context:
Words with similar meaning:
* Uncharted: This refers to an unexplored territory, which could be a path that is not marked or safe for travel.
* Untrodden: This emphasizes the lack of previous passage, suggesting a wild and potentially dangerous trail.
Phrases with similar meaning:
* Unmarked path: This directly describes a trail without any signs or markings.
* Dangerous route: This emphasizes the potential hazards present on the path.
Wordplay:
* Un-cleared trail: This is a play on words, using the prefix "un-" to imply a lack of clearing.
Ultimately, the best word or phrase to use depends on the specific situation and the desired effect.