California is leading the way in hydrogen mobility innovation, with a focus on expanding the use of hydrogen beyond road vehicles. The state's ambitious policies aim to promote zero-emission fuels for various sectors like aviation, rail, and shipping. Despite the enthusiasm for hydrogen as a low-carbon fuel, challenges persist. High costs of hydrogen, especially at refueling stations, are a barrier to widespread adoption. However, the private sector is experiencing growth in heavy-duty applications despite the costs remaining high in relation to market objectives. California is investing in infrastructure to support zero-emission vehicles, including hydrogen refueling stations, to overcome these challenges. Investments in aviation and rail, with projects like hydrogen-powered aircraft and trains, illustrate the state's commitment to sustainable transportation. The maritime sector is also emerging, with the announcement of the first commercial vessel powered by hydrogen fuel cells. California's efforts in hydrogen mobility position it as a pioneer in sustainable transportation, with ongoing investments and innovations shaping the future of eco-friendly mobility.