So many normal activities can be turned into meditation techniques, and running is one of these things.
Runner's high is the experience of meditation during running. Many people experience it and don't make the immediate connection between the two.
Objects of focus vary in meditation. In running meditation, you are focusing on the breath and the sensations of the body while running. This is the immediate physical reality, and you are concentrating on that while relaxing into the run.
You can add mindfulness to your running as well. If thoughts come up, take note of them without judgment. They are happening in the now. They are not distracting you from the here and now.
After taking note of the thinking process, go right back to the immediate physical reality. Try to let go into that.
It may also help you to breathe diaphragmatically. This means that your abdomen expands like a balloon and your chest hardly moves at all. This will fuel your muscles with more oxygen and increase stamina.
If your left foot and then your right foot hitting the ground counts as one cycle, try this. Inhale deeply through the mouth for four cycles and exhale for four cycles with equal intensity. Become as absorbed as possible in your breath. The video goes into more depth.