Are We Thinking the Northern Fortress Is Utumno?

Sindvar asks, are we thinking the northern fortress is utumno like it's implied to be or just a minor nameless fort? It's not utumno. utumno was in Beleriand and Beleriand is mostly now sunk underneath the sundering seeds. Also from Sindvar, thoughts on casting for the Noldor, the elves, particularly Finrod and Kellebrimbor and ElrondFrom Craig: I want to know if these actors and actresses that are quite interesting to look at work well as elves.