Some impressions of the river valleys of Heortland. They are often called fjords, but aren't actually the results of glaciation.
Here's the entrance to the Horting Fjord - the mouth of the Bullflood River.
I suspect further upriver near Durengard it is more like:
As you can see, above the river valley cuts through a plateau with gentle hills.
As we go upriver, we get back into rugged hill country into we get into the Storm Mountains. This is in the Jab Hills south of the Print: