"Hey, don't wander off, this area is explored, but we don't know what might have changed since the monsters decided to attack us back then, there might be some danger even here right now." Raigon suddenly told two men who were looking around and had strayed a bit from the rest of the group before turning around and continuing deeper inside the mountain range.
The mountain range is situated on the right side of the kingdom and was one of the natural barriers that divide it from the kingdoms on the other side.
It's fairly large and the kingdoms on the other side are actually not in the same area as Riplas and the other kingdoms.
Since the mountain range is fairly close to the capital, there was always worry about it and whether or not it was safe for the capital city to be so close since nobody knew whether the monsters would attack them or not.