E12 ‘The Mediterranean Sea trail’ E12 is 1.800 km and passes through Spain, France, Italy and Slovenia. !! E12 is under construction !! The data on the countrypages are data, which are verified by ERA. E12 in Spain E12 in Italy E12 in Slovenia E12 in Croatia E12 on Waymarkedtrails E12 on Wikipedia E12 on Traildino