Why not ask creation scientists where they are? They would have to hold more water than the oceans in order to provide enough water to cover the mountains.
I have trouble believing you are serious about this. You are joking, aren't you?
Somebody once claimed the Ark is at the 13,000 foot level on Mt. Ararat. I did the math on that (volume of a sphere of Earth's radius+2.46 miles minus the volume of a sphere of Earth's radius). It requires about a doubling of the Earth's water just to get to there. If you're going to completely cover all the mountains, it's vastly more.