Balrog Breaking and Entering

[Nerwen]

Originally Posted by Morsul the Dark

like a hobbit Caefully and quietly

Somehow I don't get the impression that Balrogs are all that good at stealth...

Originally Posted by Morsul the Dark

Actually maybe through another passae like the ones the orcs made home in later I mean and this is PURELY Conjecture they(the tunnels) did all kind of intersect somehow. Or he could havee gone through the west gate which may have been much less populated than the other side

I don't think so, Morsul– it doesn't fit with what we hear of the Balrog hiding "at the foundations of the earth", and the fact that it was only excessively deep mining that disturbed it. It wasn't actually in Moria until then, but rather beneath it, with no way of getting through.

I find it more likely that it entered through the tunnels beneath Moria– you know, the ones "gnawed by nameless things" (see The White Rider).
According to Gandalf, the Balrog was familiar with these. We're not told if there was a way directly into these deep tunnels from outside at the time of the War of the Ring, but I don't see why there couldn't have been at some point.

From an outside-the-story viewpoint, I should say that's why Tolkien bothers to mention this ancient, unknown network of tunnels beneath the mountains– it explains how the Balrog got there in the first place.

This is a pretty interesting image, however–

Originally Posted by Morsul the Dark

also here's the idea being a maiar he could look like a dwarf and only in his rage did he reveal himself.