Most cities and large towns — usually anywhere with a college or university presence or an outdoor sports center — have an oval 400-meter running track that's open to the public. Large cities like London have quite a few.
I've been using the best Apple Watches and testing them during running workouts for quite a few years now, but I'm not a big track runner. I like long, slow, plodding runs, and I like the change of scenery as I jog.
