We are proud to host one of the longest-running shoreline cleanup events in Northern California. We return in 2021 to our usual date of the 3rd Saturday in September. Join us to help keep our shorelines free of litter, clutter, recyclables that don’t belong in the wildlife habitat of the San Francisco Bay. You can make a difference in just one day. Bring your family, your friends, your co-workers, or just come join us to help keep San Mateo’s shorelines beautiful. Hundreds of volunteers pick up thousands of pounds of debris along San Mateo’s coastline and surrounding areas. After the event, we host a volunteer barbecue for all participants.