Finally remembered to look this one up...good tune!
Song of the Lonely Mountain - The Hobbit - An Unexpected Journey (2012) [Official Soundtrack]
https://www.youtube.com/watch?v=zakVfDY0xZk
That really captures the mood. A good song/theme writer or composer can do that. (But nobody beats John Williams...I digress...;)) What a gift.
I just saw the new Hobbit movie. I wonder if he did the music or score for that too?