remote mountain; mountain recesses
Refers to mountains deep in the interior, far from human habitation, or the secluded inner parts of a mountain range.
The autumn leaves in the remote mountains are already at their best.
彼は奥山に分け入って珍しい植物を探した。
He ventured deep into the mountain recesses to look for rare plants.
Every morning the hunter goes deep into the mountains to track animals.
He left the city and chose to live deep in the remote mountains.