I thought the ramparts were the best place for a good long run. Indeed the footpaths are stable and it really is the only suitable area for a run. Looking at the map it seems simple to just run around in a loop. In reality there are a lot of turns where you don't know if it is following the wall or going into the Medina. I lost my bearings and ended up running back the way I came without realizing how I had done it. Even then I got lost again on the way back.
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