hidden path; secret path
A path or trail that is concealed or not widely known, often used in literal or figurative contexts.
森の中に隠れ道を見つけた。
I found a hidden path in the forest.
Compound of 隠れ (kakure, 'hiding') + 道 (michi, 'path'). The exact historical derivation is uncertain, but the meaning is transparent from its components.