Frontline communities face the impacts of climate change, environmental harm, and extractive economies "first and worst" and resist the oppressive systems that cause these harms. Over the past year, frontline communities and community-based organizations (CBOs) have faced intensified challenges—U.S. federal attacks on environmental protections, widespread defunding of environmental justice work, and the accelerated development of data center infrastructure—affecting their ability to serve their communities. This session considers how frontline communities remain steadfast in joyful resistance of environmental injustice within a context of accelerating environmental, social, and technological change. We seek to center frontline work within the AGU community and welcome submissions across theory and practice, particularly those that are led by, co-produced with, or centered on frontline CBOs. Finally, we seek to create a space for networking and shared learning between collaborators, practitioners, researchers, and frontline leaders.