mountaintop
n. countable B1 Intermediate US //ˈmaʊntənˌtɑp// UK //mˈaʊntɪntˌɒp// moun·tain·top
n. the very top of a mountain. You use this to describe the highest point you can reach on a mountain peak.
n. the summit or highest point of a mountain. Often used in the plural to refer to the uppermost regions of a mountain range.
We spent the night at the mountaintop.
The hikers reached the mountaintop just as the sun began to rise over the valley.
From the mountaintop, the landscape stretched out in every direction, revealing a patchwork of forests, rivers, and distant peaks that seemed to merge with the horizon.
From mountain + top.