There are two ways to get into Lorelei Trees.
It has its own entrance above of the entrance to Lorelei.
This is the more difficult, but more direct route.
The other way is to enter Lorelei proper and traverse far, far right.
Lorelei trees is much more difficult than Lorelei, but it’s shaded and the snow stays softer.
After the trees end, it runs into the bottom of Lorelei proper.