The Mountain Summit is located high in the mountains surrounding Yukumo Village. The only monster found here is Amatsumagatsuchi. The sky in this area is blood red, with swirls of grey and purple. Roaring mountain winds can be heard at all times.
Players can man the four Ballista in the Area; this is by far the easiest way to break Amatsu's back. Players are also able to gather Ballista Ammo from various boxes on the ground. Power Seeds are also found in the area.