Josephine Mandamin was known as “Grandmother Water Walker” and Biidaasige-ba (“the one who comes with the light”). She was a world-renowned water-rights activist. Mandamin walked around the Great Lakes from 2003 to 2017 to bring awareness to the problems of water pollution and environmental degradation on the Great Lakes and on Indigenous reserves in Canada. Her great-niece, Autumn Peltier, followed in Mandamin’s footsteps, becoming the next generation’s “water warrior.”