The trail continues along the ridge.
From the ridge, you can see the surrounding mountains well.
The climbers walked along the ridge heading for the summit.
After passing through the forest, we came out onto the ridge.
This trail crosses the ridge and continues into the next valley.
尾根 is the plain, specific term for a mountain ridge, while 山の背 uses 背 in a more figurative, image-based way to describe the same feature.
尾根 is the raised ridgeline of a mountain, while 谷 is the low valley or ravine between mountains.
Standard kanji spelling; high-frequency news word.
Compound of 尾 (o, 'tail') + 根 (ne, 'root'), referring to the tail-like crest of a mountain.