Translation of sable

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 climb was much exhausting than I had presumed. I had forgotten that we were at high altitude where there is less oxygen and that every step required double effort. It was a great exercise.
Sorry for bothering you with so many questions. You are going to be my first online language course. The more I trust you and your website, the more I will use it and recommend it...No problem...