I spent a lot of time looking at stones but if I remember correctly, they all stand separately and not clumped with other stones, usually in a clearing or a slight rise.
The beast stone is due south (the bottow of your map screen) of the Skaal village, before you get to the lake. Leave the skaal village from the point where the armourer's hut is on your left, walk south towards the lake. It is the only stone without snow on top in the area, and if you avoid the Riecklings you should walk smack into it.
I found the map you get from the shaman (Korst Wind-Eye?)pretty accurate, but you could also check the construction set. Its name is Act_BM_stone_beast_01 it will be under activators not statics.
A minor point though, if youre having trouble finding the stones its going to be a bitch to complete the quests to 'activate' each stone. Try UHS hints
http://www.uhs-hints.com/uhsweb/hints/bloodmn/64.phpI'd suggest that you not focus too much on finding the stones and start enjoying wandering in the snow with werewolves....