Looking on the internet deeply has found these results:

at the mountain is the most popular phrase on the web.

in the mountain 199,900,000 results on the web	at the mountain 1160,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
He's a prisoner in the mountain because of me. There are gems in the mountain that I too desire. One day he became sick deep in the mountain. There is a hut in the mountain. There's this spring in the mountain at the back. He has a big house in the mountain. Those holes must lead to some unknown source of evil deep in the mountain. However, there were legends about the existence of a cave in the mountain.	Have you ever dreamed of run or even only walk barefoot in the city, at the mountain or [...] To rent small house at the mountain (altitude 1600 m)in a family ski station. quiet location outside the village on 1534m height [at the mountain Walisgaden suspension direction] house for 4 people at the mountain OK, let's take one more look at the mountain itself. Show your skills and drive your motorbike through rough terrain in desert, at the mountain... apartment for 5 people at the mountain We are almost half an hour from the road at the mountain top.

in the mountain

199,900,000 results on the web

at the mountain

1160,000,000 results on the web

More popular!

Have you ever dreamed of run or even only walk barefoot in the city, at the mountain or [...]
To rent small house at the mountain (altitude 1600 m)in a family ski station.
quiet location outside the village on 1534m height [at the mountain Walisgaden suspension direction]
house for 4 people at the mountain
OK, let's take one more look at the mountain itself.
Show your skills and drive your motorbike through rough terrain in desert, at the mountain...
apartment for 5 people at the mountain
We are almost half an hour from the road at the mountain top.