>>1875789
I checked it out and I think it's a fucky map generation where it thinks it's a mountain, but it's actually black forest. You can kinda see it at a distance where part of the slope is pure white instead of grey like the rest of it.

I've encountered a similar thing when I went out fishing last night. I was obviously in the waters off of a swamp, but the map was claiming I was in the black forest. I don't think the game handles all biome borders all that well sometimes.