Against the background of the climate policy objectives of the "Green Deal" for a climate-neutral Europe by 2050, the topic of hydrogen is currently receiving renewed attention. The EU aims to develop and harness the potential of hydrogen for decarbonising our economies through investment, market creation, research and innovation in the coming years. The meta-study, developed in the frame of EUSALP Action Group 9, attempts to explore the main opportunities and challenges of hydrogen as a future energy vector for the Alpine area, and is intended as guidance document for policy makers in the Alpine Region.