The phrase "mountain forest" is correct and usable in written English.
You can use it when referring to a forest located on a mountain (e.g. "We hiked through a mountain forest on our way to the summit of the peak.").
The rugged high mountain regions have brown forest, dark mountain forest, and mountain meadow soils.
Higher up, in southern Italy, there are still traces of the ancient mountain forest, with truffle oak, chestnut, flowering ash, Oriental oak, white poplar, and Oriental plane.
Four fairly distinct vegetation zones can be discerned in the Altai: mountain subdesert, mountain steppe, mountain forest, and the alpine regions.
The mountain forest zone has a moderately cold climate, while an upland tundra climate characterizes elevations of 10,000 feet and above.
South Asia has a broad range of habitats and environments, ranging from desert to rainforest and from shallow tropical seas to frigid mountain forest.
The mountain forest zone is most characteristic of the Altai proper; it covers about seven-tenths of the territory, mostly in the low and medium mountain regions.
I defined five kind of vegetations by characterising the dominant species; fynbos, black wattle, grass, pine, afro-mountain forest.
The reserve is a mountain wilderness reserve consisting of deep ravines with afro-mountain forest, rocky mountain tops and high meadows of fynbos.
The reserve is a mountain wilderness reserve consisting of deep ravines with afro-mountain forest, rocky mountain tops and high fynbos meadows.
The native Hawaiian nobility killed mamos for their feathers, but the birds nevertheless remained fairly numerous until the Americans destroyed their mountain-forest habitat.
The Forest area was subdivided into North-Eastern Forest (825; 19%), Interior Forest (1,314; 30.2%) and Mountain Forest (401; 9.2%).
