I have for the most part been able to switch off my thoughts at times when I'm running, but I'm still very new to long distances. I run at a very slow pace (I'm now switching to longer strides). There's brief moments of "this feels pretty nice", but most of the time is spent droning out to my playlist. I did 9.5 miles on Monday, and I didn't enjoy it as much as I should have, probably because I was running so slow. Being out in 100 degree heat for a few hours takes its toll. The next time I run will be probably be at a faster, more manageable pace so I don't beat myself up. I tend to stare in the ground in front of me as I run and it helps me not to be overwhelmed at the overall distance. I like to focus on the time, and I find that the first hour goes by quickly.