Join the ultimate Halloween celebration and fall festival, the Spooktacular Oktoberfest, at Trailside Nature Museum at Ward Pound Ridge Reservation. Come dressed up in your Halloween costume for a day of trick-or-treating, hayrides, a haunted house, crafts and so much more. Oktoberfest, in the Bergfield section, will feature live music with food available for purchase. Children’s activities end at 5:30 p.m. $25/person; children ages three and under are free. Rain or shine. Tickets available on Eventbrite.