I found it! It's at 07DE0495. Right now, you're standing at 077B0403. The easiest way to find it is this: go to the southeast corner of Muttivara, the spot where if you would go 1 more tile east you'd be in kutulaja instead or if you would go one more tile south you would be in kalmomettä.
Now: go west 1 tile and north 10 tiles. You will find a cliff tile, zoom in and it's right there near the center of the tile.
It'll always be in a cliff tile, not a hill tile or mountain tile.