Looks like you were in the right place at the right time. Your original outlook doesn't go without merit though, there really isn't many good vegan places open very late.
In regards to health, I'm amazed that you can run 11k a day??? I'm certain that you will tell me that anyone can do it, if they want to do it to improve their health. Taking care of the body is essential to our overall performance! (I'm nopt running that far though x'D)
While I may not be vegan, I do enjoy a good amount of veggies, and try to walk everywhere. Staying well-hydrated and getting ample sleep also helps too. I'm happy that your day turned out to be amazing :3