Translation of sendero

Officials say that the trip will start after lunch at around 1pm, next to the Phoenix Hall at Lili's college in Boston. During the departure of these twenty five crazy kids, major roads will be closed.
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 again connected to the same people and we were wining a little about the fact that we had to share the boat with around seventy other passengers instead of getting a little romantic private tour.