(Sources: Storm King’s Thunder, pages 100-101; Tales of the Yawning Portal)

Micro-Worldbuilding Opportunities: Another mountain range to place a mine; another mountain range to place a dragon lair. It's all good.

I'll be placing White Plume Mountain in this area, around Sundabar. A Dwarf there will slip away into the surface world and ask for a party of adventurers to quietly deal with the lost treasures (The Three Treasures from the Dungeon Master’s Guide) which he's researching. He fears the Eldreth Valuuthra getting their hands on them—or worse, a Dwarf getting them and starting a dwarven version of the Eldreth Valuuthra!