
Bioblitz: Hellyer County Park (San José)
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At The Tech Interactive, Brownies make pepper dance with electricity, create edible art, blow balloons using density, craft lava lamps and silly putty, earning a Home Scientist badge.
Community ofrenda altar at Biblioteca Latinoamericana front entrance, inviting visitors to view and add photos or mementos of deceased loved ones, for ages 5‑under and 10+.
Puzzle swapping at Santa Teresa, San Jose, with 350‑piece and larger puzzles, limited to three to five trades per week, ages 10 and up.
Bay FC hosts a Fan Appreciation Match against San Diego Wave, honoring supporters in their final regular‑season home game.
Free Halloween night at Emma Prusch Farm Regional Park features candy, games, food trucks, animals, haywagon rides, and more.
Candy, games, food trucks, farm animals and hay wagon rides fill Emma Prusch Farm Regional Park for a free Halloween celebration, all ages.
Volunteer to weed invasive plants and prune for fire mitigation in Alum Rock Park, with tools, instruction, and required water, snacks, sunscreen, and long sleeves.
Members only field trip visits Hayward’s Landing and Mt. Trashmore.
Field Trip at Picchetti Ranch, Cupertino.
Drop-in: Fall Migration at the Bay! (Mountain View) — Informal gathering exploring fall bird migration in the Bay Area.
Field Trip at Stevens Creek County Park in Cupertino.
Volunteer to mulch, plant, weed, and water native plants in Cataldi Park’s newly created garden, with gloves provided; wear a hat, garden shoes, and bring water.