Translation of subsuelo

Writing autobiography in another language has some advantanges. You do not have to think to much about the story and you can concentrate on the foreign language. Spanish is very suitable for that.
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.
We considered staying a little longer in this region but the weather forecast foresaw heavy winds and lots of rain. We therefore decided to move on to our next destination which was the Peninsula Valdes.