For this Eastern Idaho weekend roundup, October 23–25, 2026, families can choose Halloween evenings in Island Park, a costume parade in Lava Hot Springs, or an inclusive trunk-or-treat in Chubbuck. All event times below are Mountain Time.
Friday and Saturday: Haunts of Harriman
October 23–24, 5–9 p.m. each evening | Harriman State Park, 3489 Green Canyon Road, Island Park. Games, treats, wagon rides and movies are part of the park’s Halloween gathering. A spook alley is also planned; choose the activities that suit your children’s comfort level.
Organizers suggest a $10 donation per family and welcome canned-food donations. The park separately lists a $7 vehicle entrance fee; confirm with the park how it applies during the event. Dress warmly and follow staff directions around construction areas.
Haunts of Harriman listing · Official event information · Park updates
Saturday: Witches and Warlocks in Lava Hot Springs
October 24, noon–6:30 p.m. | Main Street, Lava Hot Springs. The chamber lists trick-or-treating, crafts, snacks and a scavenger hunt, with a costume contest at 4:30 p.m. and the parade at 6 p.m. The Blue Jay Inn, 189 E. Main Street, is the listed host venue; activities happen in several locations.
Confirm the contest location and parade starting point with the organizer. Admission and activity prices are not specified. Donations, gift cards and food boxes support the Lava Pantry.
Lava Hot Springs festivities listing · Official chamber schedule
Saturday: Special Needs Trunk or Treat in Chubbuck
October 24, 3–5 p.m. | Portneuf District Library, 5210 Stuart Avenue, Chubbuck. The library and community partners offer an inclusive event for individuals with different needs and their families, with activities, treats and treat alternatives.
Free, but one ticket per family is required. Tickets became available at the library October 12. Check availability and collect your family’s ticket before the event. Ask the library about any specific access needs.
Portneuf event listing · Official library announcement
Plan your Eastern Idaho weekend
These communities are spread across the region, so choose a local outing or allow plenty of travel time. Check the latest organizer updates before leaving. Find more ideas in the Idaho community calendar.
Details checked October 20, 2026. The image is an original AI-created illustration of representative activities, not a photograph of these events or venues.