Frozen animals and shattered trees.

Those going through the nature and more so on the way toward the mountain will notice quite a number of dead animals, trees that taken damage. Upon closer inspection it clear the animals is dead from cold, a few even frozen solid to the extend it cant be natural. Some of the trees still have iceshards sticking through them.

Almost if a blizzard of ice had been through the area, or someone rather powerfull walked through and casting icestorm as random in a rage...