The protective city walls surrounding Lucca were demilitarized during the Napoleonic era, when they became an elegant public space brimming with forest, trees, and of course — walkways. The best and most popular place for running in Lucca is the paved path along the top of the wall. The rampart paths are lined by trees, providing lots of shade in hot weather. There are lovely views of the old town’s maze of alleys and out into the surrounding parkland. The ramparts loop is 4.2 km, and there are numerous access points.
Start at any point along the perimeter, but the Porta San Pietro is an easy to find landmark right when you get off the train. You can also find gym equipment along the way, and a Parkrun (a free 5 km race) on Saturday mornings. Note: Can get crowded — best to go early!