The Highland (高地), also known as the "Fields of Natural Calamity" (天変のフィールド), is an area exclusive to Monster Hunter Frontier. It was first unveiled in the Season 9.0 update. As the name suggests, it is an area of high rocky plateaus.
The mountains and towering cliffs are largely unexplored. At the summit, there is a deteriorating forest with weathered rocks - below is an endless sea of clouds. Waterfalls are plentiful in the area. The deepest part of the Highland, in Area 4, is a cave characterized by huge stone pillars.
The Hunter's Guild refer to this area as the "high ground" although it is still shrouded in mystery.
Two new herbivore monsters are indigenous to this area: Erupe (エルペ), a type of ram; and Burukku (ブルック), a medium sized bison-like creature. A large predatory wyvern called the Gurenzeburu also roams the area, alongside Dyuragaua, Doragyurosu, Pariapuria and Kuarusepusu.
The Highland is the only environment in the Monster Hunter series where the weather can change mid-quest.