The largest one-day volunteer spruce-up of the parks in the county. Help give back to your local park with tasks ranging from removing invasive plants, clearing trails, picking up trash or helping out with planting. Great for service hour credits for groups and individuals alike. Call parks for a list of opportunities and sign up, or just show up on the day between 10 a.m. and 3 p.m.

• Lenoir Preserve, Dudley Street, Yonkers – (914) 968-5851
• Read Wildlife Sanctuary, Playland Park, Rye – (914) 967-8720
• Cranberry Lake Preserve, Old Orchard Street, North White Plains – (914) 428-1005
• Marshlands Conservancy, Boston Post Road, Rye – (914) 835-4466