Climate mitigation in forest systems is critical for limiting global warming and has important implications for biosphere functions related to freshwater and biodiversity. However, there are major knowledge gaps related to the future resilience of forest-based interventions - i.e., their capacity to remain functional in delivering desirable water-climate-biodiversity functions despite natural and anthropogenic perturbations. The research initiative “Understanding and securing the resilience of forest-based climate change mitigation” (ReForMit) aims to close these gaps, by generating knowledge on how to safeguard the biophysical and social-ecological resilience of forest-based climate change mitigation measures under shifting hydroclimatic conditions. The first step is to design archetypical forest-based mitigation scenarios in close collaboration with stakeholders. To prepare for this session, we will additionally conduct a pre-survey. This session engages stakeholders in co-designing global scenarios of forest-based climate change mitigation. This involves identifying relevant modeling variables, definition of areas to conserve and measures with which to restore degraded areas, such as managed forests, natural regrowth, or woody biomass plantations. It will result in the establishment of a global reference group for ReForMit with representative stakeholders that will be consulted about selection of indicators, modeling variables and case studies that will ultimately be shared with global policy-makers.