The European Union has set ambitious decarbonization goals for member states, including Spain, to reduce GHG emissions and increase renewable energy consumption by 2030. Spain aims to achieve these targets by shifting from fossil fuels to renewable molecules like biomethane in critical sectors such as industry and transport. Biomethane, considered a key low-carbon alternative, could replace natural gas and play a significant role in accelerating Spain's energy transition. By producing biomethane, Spain could meet its decarbonization objectives, especially in high-temperature industrial processes. The country's energy self-sufficiency could also increase as biomethane production reduces reliance on natural gas imports. Additionally, biomethane supports the principles of a circular economy by converting waste into green energy and by-products. The growth of the biomethane market in Spain presents opportunities for economic development, particularly in rural areas where the production potential is significant. This article explores Spain's potential to emerge as a European leader in biomethane production, highlighting the key challenges and initiatives needed to surpass production milestones and unlock biomethane's full potential.