The workshop side event aims to create more awareness of the potential of hydrogen technologies to decarbonize the economy in central and eastern European countries. The workshop aims to share with local authorities, companies and research institutes, knowledge and experience of setting up hydrogen valleys to help the advancement of creating a “North Adriatic Cross-border Hydrogen Valley”. The event will welcome authorities of Slovenia, Croatia and the Italian region of Friuli-Venezia-Giulia who will endorse the support to create a “North Adriatic Cross-border Hydrogen Valley”. Keynote speeches on hydrogen valleys will be delivered by the European Commission and the coordinators of the Hydrogen Valley in North Netherland and the one on the island of Mallorca (Spain). After that a session will invite companies, research institutes and port authorities of both countries and the Italian region to hear their plans and the roadblocks they face. In addition to the policymakers also the private side Hydrogen Europe and Hydrogen Europe Research support this cross-order hydrogen valley.