Here are some motivational quotes about running that I found:

- “I don’t run to add days to my life, I run to add life to my days.” — Ronald Rook
- “There are clubs you can’t belong to, neighbors you can’t live in, schools you can’t get into, but the roads are always open.” — NIKE
- “The miracle isn’t that I finished. The miracle is that I had the courage to start.” — John Bingham
- “Running is 90 percent mental”—a fitting sentiment and perhaps the most famous of running quotes. Whether you’re pushing your pace or your distance, your body can only go as fast or far as your brain believes possible. Ask any athlete: and they’ll tell you mental toughness is just as important as physical strength.

I hope these quotes help motivate you! Let me know if there's anything else I can help you with.