Every year Maynard's downtown businesses and the Assabet Valley Chamber of Commerce team up to host a downtown trick-or-treat event. Citizens big and small get decked out in Halloween costumes and head down to fill up their bags with treats provided by the local businesses.
According to someone I know in the Maynard Business Alliance, the event is scheduled for Thursday, October 30th. She thinks the start time is 4:00, but keep your ears out in case I'm wrong.
Plan your driving accordingly because they shut down Nason Street, and on Main Street there will be lots of people walking and crossing the street.