I don't run nearly as far as you probably are, so I don't know for certain if I could ever get bored running. I just blast music in my ears, but I barely even hear it, because I get into a zone when I run. That is why I can't imagine being bored while I run. My mind rapid fires. All the time. Even when I am trying to fall asleep. It's a curse. Running is the only thing, other than serious drugs, that truly calms my mind and allows me to focus on nothing. I love that feeling -- getting physically exhausted, sweating and being able to push myself, because of the feeling of calm and the fact that my mind can be on a vacation in some dreamland a thousand miles away. I can't imagine the boredom of just running if I didn't have that.