Building on previous tribal engagement, River Network helped launch and facilitated early discussions of the Indigenous Waters Network meant to identify solutions to water quantity and quality threats facing tribal communities across the US. With funding from US EPA, this tribal caucus discussed topics ranging from water sovereignty to implementing the Clean Water Act on tribal lands, as well as other issues. River Rally proved to be an important annual gathering for the tribal caucus, and played a significant role in broadening participant demographics: up to one third of Rally participants in this era identifying as Black, Indigenous, and/or person of color.