I also do long run (80k, 100k distances so far) and maybe the first 30k-40k can be pleasant and feel transcendental, but after that everything is pain. Also at

I also do long run (80k, 100k distances so far) and maybe the first 30k-40k can be pleasant and feel transcendental, but after that everything is pain. Also at some point the pain disappears and then there is nothing.