The Three Beggars, Scene 3: Venturing the Mountains
It takes quite a while to study the book, but eventually you find the right kind of references.
The Crystal Mountains range, north of Hellwinter, was once home to the legendary High White Elves of Kiryel Than, secluded noble Elves who chose not to have any deal with the kingdoms of men. The Temple of Hamaskar was the White Elves’ most sacred place, so it’s likely to be found on the most impervious mountain reaches.