Monk Seal Enrichment Building Day

Sat · Oct 31·9 AM – 1 PM·Bay Area Discovery Museum · Sausalito

Goblin Jamboree (Bay Area Discovery Museum) — a just‑spooky‑enough Halloween adventure turning the museum into playful surprises and hands‑on fun.

Sat · Oct 31·8:30 AM – 4:30 PM·San Francisco, CA (Farallon Islands)

Eight‑hour naturalist‑led whale watching expedition sails from San Francisco under the Golden Gate Bridge to the Farallon Islands, featuring an expert naturalist, $320 per person, ages 13+.

Sat · Oct 31·9 AM – 12 PM·Presidio Trust · San Francisco

Presidio Habitat Stewards at Presidio Trust in San Francisco.

Sat · Oct 31·9:30 AM – 12:30 PM·Burning Man Decompression (SF) · San Francisco

Experience a Halloween‑themed three‑hour nature walk among wild horses, jackrabbits, coyotes and new sculptures at Burning Man Decompression’s Fly Ranch.

Wed · Nov 11·11 AM – 1 PM·Ke Kai Ola, 73-731 Makako Bay Drive, Kailua-Kona, HI · Sausalito

Invasive Plant Removal Work Day (Ke Kai Ola, 73-731 Makako Bay Drive, Kailua‑Kona, HI).

Thu · Nov 5·5:30 PM – 7:30 PM·meets by the Barn · Muir Beach

At meets by the Barn, participants work wool with sheep, pick, clean, card, spin, collaborate on weaving or felting, and keep a felted soap, ages 14 and up.

Sat · Oct 31·1 PM – 4 PM·Randall Museum, 199 Museum Way, San Francisco, CA 94114

Drop-in art workshops in the Randall Museum’s Art Room feature instructors guiding a new hands‑on project each week, $5 per person, for all ages.