User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-6050823-20131128025834/@comment-6050823-20131129150739

There are actually two UGF in MH4, gameplay wise atleast. One in the mountains, the High Rank one, and one in the low lands in-between the Great Desert, Ruins Field, Primeval Forest, and Underground Caves/Volcano, Low Rank(I'm going by the map in-game).