Halloweekend October 30-November 1, 2026 Halloweekend is typically anchored by Trick-or-Treat on MainStreet, a wildly popular event that turns Central Avenue into a ghoulish pedestrian area!

Trick-or-Treat on MainStreet Friday, Oct. 30, 2026, Central Ave. closes to pedestrian-only traffic and local businesses and organizations hand out candy to costumed families! Businesses should be registered to distribute candy at their storefront or to set up a separate booth. For questions, please reach out to [email protected]. LOS ALAMOS HALLOWEEKEND 2026: Fall Party @ Family Strengths Network Outdoor games, trick-or-treating, and costume runway (Session 1). https://www.lafsn.org/calendar/fall-party Los Alamos Medical Center (First Floor & Back Lawn) Hospital departments set up themed booths to give away treats. Trick-or-Treat on MainStreet Downtown closes Central Ave. to vehicles for downtown-wide trick-or-treating. Sensory-friendly trick-or-treating during downtown hours. Free. https://peecla.app.neoncrm.com/event-detail?event=74819& High-Tech Halloween at the Bradbury Hands-on science fun during Trick-or-Treat on MainStreet. Please park in the back lot, as there will be a “treat trail” in the front parking lot. Trick-or-Treat at the Climbing Wall Halloween costume climbing wall session for ages 5–17. Los Alamos Nature Center, Planetarium Full-dome planetarium show ($6 child / $8 adult / $20 family). peecnature.org/events Games, music, and treats for high school teens. Free. Saturday, October 31, 2026 Fall Party @ Family Strengths Network Family Strengths Network, Los Alamos Outdoor games, trick-or-treating, and costume runway (Session 2). https://www.lafsn.org/calendar/fall-party Black Holes Planetarium Show Los Alamos Nature Center, Planetarium Full-dome planetarium film ($6 child / $8 adult / $20 family). https://peecla.app.neoncrm.com/event-detail?event=76129& Treasure hunt, crafts, door prizes, and treats. https://www.naturalgrocers.com/events/spooktacular-family-fun-2026-6 Monster-themed community blood drive co-hosted with Vitalant. Pueblo Canyon Inn, 199 San Ildefonso Rd., Los Alamos Outdoor haunted path hosted by local teens. Free. https://www.visitlosalamos.org/Events/The-Haunted-Trail ADDITIONAL FALL 2026 EVENTS (OCT. 1 – NOV. 7) Lucky Ducky Day | 10 a.m. - 2 p.m. Ashley Pond Park Downtown Los Alamos Family Strengths Network's annual Lucky Ducky Day carnival fundraiser. Games, raffle, bounce houses, silent auction, face painting and more. $10 entry LUCKY DUCKY DAY FLYER Downtown Los Alamos Scarecrow Contest Central Avenue, Downtown Los Alamos Local businesses and organizations display themed scarecrows downtown. https://www.losalamosartscouncil.org/scarecrow Harvest Festival | 11 a.m. - 2 p.m. Los Alamos Co+op Market Pumpkin painting, local artisan vendors, smash burgers, and seasonal foods. https://losalamos.coop/events LAHS NJROTC Pumpkin Patch Canyon School Complex (885 Trinity Dr.) Weekdays 4–7 p.m. | Weekends 10 a.m. – 7 p.m. Costume Swap & Pumpkin Walk | 2-4 p.m. Chamisa Elementary School Gym, White Rock Donate costumes 9/21-10/16, Crafts, baked goods, popcorn, costumes and fun. Purchase tickets at the door for the cake walk- $1 per ticket/ 25 tickets for $20 FLYER Fall Minis Workshop Fundraiser 2 Sessions | 10 a.m. - 12 p.m. (Families), 12:30-2 p.m. (14+) Los Alamos Community Ceramics, 2101 Trinity Dr., Ste Q1 German food, live music, craft beer, and chairlift rides. clayclub.org Pajarito Mountain Ski Area German food, live music, craft beer, and chairlift rides. https://www.festivalsinamerica.com/festival/pajarito-mountain-oktoberfest-los-alamos Mountain Halloween Carnival | 3 p.m. – 6 p.m. Mountain Elementary School (2280 North Rd.) Haunted house, games, cake walk, bounce house, costume contest ($15 wristband). https://www.mountainpta.org/halloween-carnival/ Pumpkin Splash | 9 a.m. – 11:30 a.m. Los Alamos County Aquatic Center Diving for pumpkins starting at 10 a.m., followed by open swim. https://www.visitlosalamos.org/Events/Pumpkin-Splash Pumpkin Carving Party |10 a.m. – 12 p.m. First 60 pumpkins are free (one per family). Carve on-site or buy from the LAHS Choir Pumpkin Patch. Drop off by 4 p.m. for display. https://www.losalamosartscouncil.org/events-2-1/pumpkin-glow-2026 Annual Pottery Sale | 10 a.m. - 3 p.m. Los Alamos Community Ceramics, 2101 Trinity Dr., Ste Q1 Pottery for sale and kids crafts. Pumpkin Glow: Pumpkin Toddle Time | 5 p.m. – Dusk Fuller Lodge Lawn Sensory-friendly viewing for toddlers and very young children before dark.. https://www.losalamosartscouncil.org/events-2-1/pumpkin-glow-2026 Los Alamos Arts Council Presents: Pumpkin Glow and Contest | Dusk – 9 p.m. Fuller Lodge Lawn Hundreds of carved pumpkins lit up on the lawn. Free public event.. https://www.losalamosartscouncil.org/events-2-1/pumpkin-glow-2026 Witches Night Out: Family Hi-Low Glow | 6-9 p.m. The Family YMCA Basketball Gym Get ready to MOVE, GLOW & HAVE SOME HALLOWEEN FUN! Turn down the lights and turn up the fun! Join us for a FREE Glow HIGH-LOW Fitness class under the blacklights at the YMCA. Enjoy upbeat music, easy-to-fol