Time is running out to experience Illumination: Tree Lights at The Morton Arboretum, Chicago’s beloved outdoor holiday tradition, as the 13th annual celebration of trees in winter continues through Saturday, Jan. 3, 2026. A nationally acclaimed holiday lights display, Illumination has welcomed more than 2 million visitors since its debut. This season’s one-mile, ADA-accessible walking trail features 20 immersive light displays that transform the Arboretum’s winter landscape with color, light and music. Added by popular demand after selling out, a new Dog Admission Night invites guests to bring their canine companions along the lighted trail on Friday, Jan. 2. Dog Admission Night requires an Illumination ticket for human admission and a separate $10 ticket for dog admission to the event. Holiday schedule note: Illumination will be closed on Christmas Eve and Christmas Day. The exhibition will be open nightly from Dec. 26 through Jan. 3, from 4:30 to 9:30 p.m., with last admission at 8:30 p.m., including New Year’s Eve and New Year’s Day. For more information or to buy tickets, visit www.mortonarb.org.

Photo Credit: The Morton Arboretum