Good question. You lived in DC and in Chicago, how were they? I recently went on a great run in DC at a place called "Rock Creek". In DC you also see people running at the Mall amongst all of the monuments. I'm not sure that I would enjoy that so much, but perhaps. I also think that DC has a good climate for running. It's important to have cold weather, but not too cold. Michigan gets too cold, I would say that Chicago does too, plus it's so windy. I like Raleigh Durham. Though they are not huge cities, they have plenty of trails and they tend to be very wooded and shady. It's extremely hot this time of year, but the rest of the year more than makes up for it.I wonder which city is the runner's paradise? Perhaps it's just the place closest to the longest system of trails. Any nominees?