And kicking it off is the adults-only "Illumi-Brew" 5:30 to 10 p.m. this Friday, where you can sample local beers along the trail.
The arboretum's head of special events, Jenelle Metcalf, gave ABC7 Chicago a preview Tuesday.
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Tickets to IllumiBrew are $85 for members and $95 for other guests, with designated driver tickets $45 for members and $55 for nonmembers.
Illumination is now in its 12th year.
The 2024-25 Illumination season will run Nov. 16 through Jan. 4, 2025.
Visit https://mortonarb.org for more information.