Erôn-Esroth; which means ‘Castle of the Eastern Winds" in elvish, is a large Serathian fortress located in a rocky passage in the far-southern region of the Greymist Hills

The fortress lies along Serathyr’s northern border with Elyria. The castle was built in the early Sixth Age by the Serathian royal court and is now manned by the Serathian army. The fortress keeps vigil on the Elyrian outpost of Wymerly Keep.

This fortress played a key role in the terrible War of the Fallen Crown, and is currently the base for many covert Serathian raids into Elyrian territory.