9 am – noon The Running Dead 5K Run/Walk Ages: AllFamily Food & Drink Fundraisers Shortfront ParkPatchogue
9 am – noon Rhatigan’s Run 5K Run/Walk Ages: AllFamily Fundraisers Halloween Floral Park Knights of Columbus CouncilFloral Park
9 – 10 am Parent and Me Music and Movement Ages: 2 and underFamily southampton cultural centerSouthampton
10 am – noon AMSEAS Beach Walk & Cleanup at Hallock State Park Animals Community Hallock State Park PreserveRiverhead
10 am – 4 pm Sculpture in the Garden: Jorge Pardo at Landcraft Gardens in Mattituck. Art Outdoors Landcraft Garden FoundationMattituck
10 am – noon AMSEAS Beach Walk & Cleanup at Hallock State Park Environment Free Hallock State Park PreserveRiverhead
10 am – 4 pm Bats, Barnacles & Broomsticks Halloween Party Ages: AllFamily Halloween Holiday Long Island AquariumRiverhead
1 – 2 pm Science Saturdays: Spa Chemistry Candy Corn Bath Bombs Ages: 5 – 12Family Halloween Holiday Long Island Science CenterRiverhead
1 – 4 pm Fall Festival Trunk or Treat BBQ Ages: 8 and underAttractions Community Family True Light ChurchSouthold
9 am – noon Matthew’s Monster Dash 5K Goblin’s Fun Run & Toy Drive Ages: AllFamily Fundraisers Halloween Centre Island BeachBayville
9:30 am – noon The Elizabeth Ferris Memorial 5K Run/Walk Ages: AllFamily Fundraisers Sports Heckscher State Park Field 1East Islip
2:30 pm “Now and Then” presented by Hampton Theatre Company Comedy Theater Quogue Community HallQUOGUE