4 – 10 pm Downtown Riverhead’s HalloweenFest and Parade Community Festivals Riverhead Town SquareDowntown Riverhead
5 – 6:30 pm The Fish Guy talks: Whale Watching! Environment Free Sag Harbor Whaling & Historical MuseumSag Harbor
10:30 – 11:30 am Storytime & Craft: Hermit Crabs & Fishes Environment Free South Fork Natural History Museum (SoFo)Bridgehampton
1 – 3 pm GHBC Howl-O-Ween Ages: 8 and underCommunity Family Food & Drink Greenport Harbor Brewing Company’s Peconic Tasting RoomPeconic
10 am – 2 pm Call for Artists: Ten-Squared Online Exhibit & Sale Art Craft & DIY Southold Historical MuseumSouthold
5:45 – 7:30 pm Classic Movie: And Then There Were None (1945) Film Free Rogers Memorial LibrarySouthampton
11:30 am – 12:30 pm Fountain of Youth Yoga Therapy with Frances Cole Jones Classes Community The Nathaniel Rogers HouseBridgehampton
1 – 2:30 pm Long Island Lighthouses with Eco-Photo Explorers Free Talks Rogers Memorial LibrarySouthampton
5 – 6 pm Bottle of Red and a Character’s Dead Mystery Book Club Books & Readings Free The Hampton LibraryBridgehampton
10 am – noon AMSEAS Beach Walk & Cleanup at Hallock State Park Animals Community Hallock State Park PreserveRiverhead
Today, 10 am The “725 Art Show” at the Sag Harbor Whaling and Historical Museum Sag Harbor Whaling & Historical Museum
Long Island Press Going Places: Discovery Bicycle Tours’ Vietnam: Hue’s Citadel, ‘City of Ghosts’ & the Challenge of Biking the Hai Van Pass