The Eastside Trail, one of the first finished sections on the old rail corridor, connects Piedmont Park to Inman Park and Old Fourth Ward. And it has become especially popular. Really, really popular. 

To the point where, sometimes, it feels like half the city is walking, biking, skating or jogging from the park to Ponce City Market. I live in Midtown, so I use the BeltLine a fair amount, and recently I've begun to realize that these hordes of people, while overwhelming en masse, actually fall into several clearly defined categories.