The Charles River Watershed Association is sponsoring a City Streams Walk on Friday, September 11 from 10:30 – noon. It’s part of the Meet Your Watershed Event Series. Meet at Mass Audubon’s Boston Nature Center & Wildlife Sanctuary, 500 Walk Hill Street in Mattapan. Join CRWA and Mt. Hope Canterbury Neighborhood Association for a walking tour of Canterbury Brook. For more information visit https://www.crwa.org/events