Mountains are not a specific biome, but rather a landform that can occur within a variety of biomes. Mountains can be found in tropical rainforests, temperate forests, deserts, grasslands, and even tundra regions. The climate and vegetation of a mountain will depend on its location and elevation. For example, mountains in tropical regions will be much warmer and more humid than mountains in polar regions. Similarly, mountains at high elevations will be colder and have less vegetation than mountains at lower elevations.