I did a 24-hour running race a couple of months ago. Didn't hit my goal, but still came back with 50 miles under my belt.

To me, the bliss is the moment I forget I've been running for five minutes, or 15, or an hour. I can't meditate. Sitting still and breathing, it's never worked for me. I collapse in on myself. But when out running, or even just walking if it's a longer distance, I hit a point where I disconnect. My body is doing... something, and meanwhile I'm off diving deep into ideas or worlds or scenarios or who-knows-what-else.