For Path of Exile 2 , the Glacial Tarn entrance opens after you defeat Lythara, the Wayward Spear in Kriar Village ; from there, the area connection leads into Glacial Tarn and then onward to Kriar Peaks.

Route

  • Travel to Mount Kriar via the quest route.
  • Go through The Refuge and into The Ashen Forest.
  • Head across Kriar Village to find the Lythara boss path.
  • Beat Lythara, the Wayward Spear to unlock Glacial Tarn nearby.

Reddit-style tip

Players discussing Glacial Tarn routes often describe it as a straightforward “follow the path from Kriar Village” situation rather than a hidden secret area.

Extra note

If you were asking about the New World dungeon with the same name, the advice is different and points to a shrine/path route instead.

To match your post title more cleanly, a good short answer would be: “In PoE 2, get to Glacial Tarn by progressing through Mount Kriar and Kriar Village, then kill Lythara to unlock the entrance.”