Gentle Walks at 9 a.m. at the Nature Center. A gentle walk for which the emphasis is on discovery, not mileage gained. Free.
Fourth Friday Fractals at 7 p.m. at the Nature Center. See fractals in nature as a full-dome planetarium show! Cost is $10 for adults, $8 for children. More information at peecnature.org.
Trick–or–Treat on MainStreet will haunt downtown Los Alamos from 4 p.m. on Central Avenue, between 15th to 20th streets.
High Tech Halloween at the Bradbury Science Museum from 4-6:30 p.m. Interactive demonstration of a vacuum chamber, a simulated chain reaction using lights and optics and a “Critter Alley.”
Pet Costume Parade starts at 5:30 p.m. on Central Avenue. Participants should meet at the Ashley Pond Elephant statue by 5:15 P.M. Festivities will continue at the Family Y for a costume climb from 6-8 p.m.
Pumpkin Carving Contest at 10 a.m. at Smith’s Marketplace.
Masquerade Recital and annual Pumpkin Glow from 6-9 p.m. at Fuller Lodge.
Halloweekend Dance from 6:30-9 p.m. at Fuller Lodge.