Lorenzo, VivianaMassari, Martina2023-06-072023-06-072019978-88-99243-93-7https://hdl.handle.net/20.500.14235/234The paper explores through the lens of participatory processes the growing movement of Climathon®, understanding their potentiality in innovating urban planning. Climathon® are expressively collaborative design events, aimed at developing solutions to tackle climate change at the urban level. These events represent ‘safe arenas for experimentation’ where multiple levels of knowledge, institutions, resources and actors, are systematically involved in the development of ‘urban climate change experiments’ to increase resilience and foster the ecological transition of cities. Through documentary research and semi-structured interviews, the paper analyzes two European case studies, from the genesis of the challenge to the outcomes, to understand their degree of participation and inclusiveness, which forms of partnership and incentives make the ideas come into action, who are the actors and stakeholders involved, how charges and benefits are distributed, and how does Climathon® fit into local and regional planning. By reading the process beyond the products, the paper explores if these co-planning moments, if properly linked to the overall planning process, could represent a new form of ecological planning made of small incremental parts, foreseeing their replicability on regulation and decision-making practices.enClimathonurban resilienceco-planningecological planningArticle479-487