cliff path; path along a cliff
Refers to a narrow path or trail that runs along the edge of a cliff, often with a steep drop on one side.
崖道を歩くときは足元に気をつけてください。
Please watch your step when walking along the cliff path.
Compound of 崖 (gake, 'cliff') and 道 (michi, 'path'). The reading がけみち is a straightforward combination of the kun'yomi readings of the two kanji.