Which One is It?

Greyson called me from a friend's house to ask about watching a movie.
He told me the title but I still had my doubts.
"Why is it called 'Race to Witch Mountain?'" I asked.
"I think because they're not sure which mountain to go to."
Ah.

'Race to Which Mountain.'
Or would you write it with a question mark--
'Race to Which Mountain?'
That sounds like a fine movie to watch, rather exciting really.
Can't you just feel the conflict?