Start at Yıldız Park entrance near Beşiktaş (free entry before 8am), run through the old Ottoman palace grounds, exit at Çırağan Palace, then follow the coastline to Ortaköy. Perfect 6km with minimal traffic.

Best part is running past Dolmabahçe Palace and along the water. Finish with breakfast at Ortaköy's weekend market. Early morning only - gets crowded and hot after 9am.