In this adventure which appeared in Dungeon Magazine #118, the characters head to a fort embedded on the edge of the Jotens in Sterich, facing off against giants, a cleric of Erythnul, and a blue dragon. This is the second adventure in the story arc, Istivin: City of Shadows. To find the city of Istivin, head to the collection for those adventures.
With these maps, in addition to the mountain fort, we have a new temple of Pelor (although it's been taken over by dark forces). The fort in the adventure has been damaged by giants, but with the "clean" version of the map, you should be able to use this map in any setting, adding what items and monsters you wish.
Cartouche heraldry by Anna Meyer, used with permission. Visit her page here: https://www.annabmeyer.com/