Translation of malhumorado

for a minute I blamed the burger that I had eaten at the duty free back in Cancun, but thinking a little further I recalled eating street food the night earlier, as it was Mexican independence day.
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.
I got to the southern tip of the island and visited the light house. I also remember to have visited some turtles or crocodiles nearby. I was not the only one who drove around the island by motorcycle.