Is it sentient? - No
A living creature/organism? - No
An object? - No
Is it smaller than an elf? - No
An event? - No
A place? - Yes
Is it in ME? - Yes
West of the Misty Mtns? - Yes.
In Eriador? - No
Was is on the surface in the third age? - No
Ummm a realm? - No, not according to Tolkien...it sort of fits the definition though....
Did dwarves, elves, or orcs create or improve it? - Way to be precise,
....hmm, well both elves and orcs were there at points, and there was some form of elvish settlement...