Two of Australia’s iconic river systems, Baaka in New South Wales (NSW) and Martuwarra in Western Australia (WA), are described in a narrative that connects Indigenous custodianship, bio-physical features and art, and contrasts settler law with First Law to provide multiple ways of seeing the two river systems. Our narrative is a shared response to: (1) upstream water extractions that have imposed large costs on Baaka and its peoples; and (2) threats of water extractions and developments to Martuwarra. By scribing the voices of the two river systems, we have created a space to reimagine an emerging future that connects the past and present through the concept of ‘EveryWhen’, where First Law has primacy, and where art connects Indigenous knowledges to non-Indigenous understanding. Through a dialogue process with Indigenous knowledge holders, artists and water researchers, five action processes, or journeys, are identified to guide water decision making towards water justice.