WeObserve brought together several Citizen Observatory projects to share and consolidate knowledge and identify best practices. Many of the insights gained have been synthesised into this detailed research and innovation roadmap for future Citizen Observatories, outlining focus areas, dedicated pathways and proposed actions in each of them. The aim of this roadmap is to outline a dynamic landscape and provide actionable pathways to further advance Citizen Observatories’ capabilities and impacts in the future. It is targeted at Citizen Observatory practitioners (research institutions, civil society organisations, public authorities and others) for conceptualising and directing key aspects of future Citizen Observatories; at national funding agencies of EU member states to identify potential scenarios for funding Citizen Observatories nationally; as well as for the European Commission as a consultation document for shaping Horizon Europe programme funding calls.