Huaynakana Kamatahuara Kana (HKK), which means “women who work” in the Indigenous Kukama Kukamiria language, is an organization of Kukama Kukamiria women from the lower Marañón River in Peru. Organized as a federation, HKK includes representatives from 29 Amazonian Indigenous communities living along the Marañón, and it has been plaintiff in multiple environmental lawsuits to protect the Marañón. The courageous members of the HKK have persisted despite facing enormous obstacles related to remote location, cultural discrimination, and gender stereotypes that have historically prevented Indigenous Amazonian women from speaking on behalf of their communities. Since its inception in 2001, its members, supported by their families and the communities they represent, have formed an organized group of empowered women to be the spokespersons and main actors in the defense of the river that, in their culture, is the source of life of their territories. Indeed, the Kukama Kukamiria culture is based on water, as the people identify themselves as children of the water and see the Marañón River as one of the entrances to the world of their ancestors. They are artisanal fishermen and honey producers, and they harvest fruits such as Aguaje. In addition to its work in the courts, the HKK hosts educational workshops on women's empowerment and for members to learn about their human environmental rights. Members become connected to networks of environmental groups and government officials with whom they can communicate about the environmental damage they witness as frontline river defenders. HKK is currently leading a legal battle, in the court of Loreto in Nauta, Peru, to have the rights of the Marañon River recognized, the Kukama culture protected, and recovery measures for the river established. (See “Supporting document” for a link to a recording of a recent hearing in the case.)