THE GR20
The word ‘tough’ is a relative term, it has to measured against something else. I had a tough day at work or I just completed a tough crossword or ate a tough steak. We are comparing the present event with some past event. The GR20 (GR is the French designation for their long distance footpaths "Grande Randonnée" the number 20 is just the one in Corsica, there are others all over France) is a tough hike, no it really is tough. I have not walked all the hiking trails in Europe