Translation of wenn nicht

The earlier you go to the top of the mountains the fewer people are on the slopes. I love the sound of the ski-lifts and seeing the villages disappear in the distance while I move up to the mountains.
The short story 'Hills like white elephants' is a short story about a relationship between a man and a young girl, based on having sexual encounters. The meaning of this story is not immediately recognizable.
Anyway, i got bored pretty fast, drank a Coconut and orange juice mix and went on. I returned my bike at four before heading again to the beach. By coincidence I met the sister of a colleague of mine.