This course is open, please find below the two extreme points, determining this route.
Start/End Point (Atlantic Ocean, Porto): Praia do Cabedelo do Douro (https://maps.app.goo.gl/pgNdjENZtJhbuKhd6), at the mouth of the Douro River where it meets the Atlantic. This marks the ocean entry point to the European continent and provides a natural and symbolic gateway into Europe. My run began on the beach itself, but the river mouth also allows flexibility: future athletes could equally choose to begin on the opposite side at the Felgueiras Lighthouse, as both locations clearly define the same Atlantic entry.
Start/End Point (Istanbul, Bosphorus Strait): Cankurtaran (https://maps.app.goo.gl/atqweTZDfYKu3ViLA), where the route meets the Bosphorus Strait — the continental divide between Europe and Asia. This serves as a fixed, visible, and historically meaningful finish line.
