This challenge (In my opinion) is absurd. Especially left unexplained. One would think all you have to do is throw snow balls in the air and off a chiff... But no, you have to use your spyglass, climb as high as you can till you reach 335 meters and then throw it down to the ground. This challenge needs to be tone down a bit. (Update: See Picture on how i completed it.)
There is an easiest way of doing that on gloriana's tears, you just need to go to the top of one of the sites of power, where a chest is located at the top and just thorw the snowball from there to the ground. Note: don throw to any directon cause there are mountains, other objects etc. You need to hit the sand. Main problem with this achieviment is new people that has not completed the story and want a t4 gear that they can not craft till they reach higher realm tiers but they dont want do that to unlock the gearto do the easiest path instead