Runner's High

I am beginning to experience that well known "runner's high". I did a short 3 miles on the treadmill today, as suggested by my training schedule, and I just got into sort of a zone. It was this feeling like I could just keep on running forever. It was a surreal feeling and I've had it before when running, but now I just feel it consistently when I run. It's a zen kind of feeling. I like it and I think every part of my being is fueled and being nourished by it.