Limited-Time Themes
Two special Night Forest experiences take over Grand Park in September and October.
Fall at TreeRunner • Westfield, Indiana
Fall nights belong in the trees.
This fall, TreeRunner Grand Park transforms after dark with two limited-time Night Forest experiences. Step into Wizarding World for two September weekends, then climb through HallowGlow every weekend in October.
Ages 7+
8 Aerial Trails
Nighttime Climbing
September & October 2026
Grand Park • Westfield
TreeRunner After Dark
The same forest adventure. A completely different atmosphere.
Climb after sunset as lighting, music and seasonal details transform the Aerial Forest for fall. Pick your theme, choose your weekend and experience TreeRunner after dark.
Climb After Dark
The aerial trails take on an entirely different feel once the sun goes down.
Fall Weekends
Wizarding World arrives in September before HallowGlow takes over every weekend in October.
2026 Fall Experiences
Pick your fall night.
Two different themes. Two different ways to experience TreeRunner after dark.
September
Wizarding World
Magic takes to the treetops.
Two Weekends Only
Enter the Wizarding World.
September 18–19 & 25–26For two weekends in September, Night Forest takes on a magical twist. Climb and zip through the trees after dark while themed lighting, music and atmosphere bring Wizarding World to TreeRunner Grand Park.
- Nighttime Aerial Forest experience
- Wizarding-themed atmosphere
- Two limited September weekends
- Adventure across TreeRunner's aerial trails
October
HallowGlow
October nights light up the forest.
Every Weekend in October
Climb into HallowGlow.
October 2–4, 9–11, 16–18, 23–25 & 30–31HallowGlow takes over TreeRunner throughout October with a colorful fall Night Forest experience. Climb and zip after dark surrounded by glowing lights and a festive seasonal atmosphere.
- Nighttime climbing & ziplining
- Glowing fall atmosphere
- Every weekend in October
- Halloween weekend dates included
Save the Dates
Wizarding World
HallowGlow
Your 2026 fall calendar.
Wizarding World arrives first, followed by five HallowGlow weekends throughout October.
September
September 18–19 & 25–26Two Friday-and-Saturday weekends of Wizarding World at Night Forest.
October
October 2–31Five weekends of HallowGlow, including Halloween weekend.
Oct. 2–4
Oct. 9–11
Oct. 16–18
Oct. 23–25
Oct. 30–31
Which One Should You Choose?
Choose Wizarding World If...
Choose HallowGlow If...
Honestly? Come to both.
Wizarding World and HallowGlow are separate themed Night Forest experiences, so each visit has its own atmosphere.
You want a little magic with your adventure.
Wizarding World is the shorter-run experience, appearing for only two September weekends. It's the first special fall Night Forest event of the season.
October is your favorite time to be outside.
HallowGlow runs every October weekend and brings the season into Night Forest with colorful lights and a festive after-dark feel.
New to Night Forest?
It's TreeRunner after dark.
Night Forest takes the Aerial Forest experience into the evening. You'll gear up, complete the required orientation and head into the aerial trails as the forest lights up around you.
Know Before You Go
Plan your fall night at TreeRunner.
Ages 7+
Aerial Forest participation begins at age 7. Course access and adult participation requirements vary by age.
View Age Guidelines →Dress for Adventure
Wear comfortable clothing appropriate for outdoor movement and closed-toe, closed-heel shoes.
Prepare for Your Visit →We're Inside Grand Park
TreeRunner is located inside Grand Park Sports Campus in Westfield. Check directions and parking before heading out.
Directions & Parking →Reserve Your Night
These are limited seasonal experiences. Booking ahead gives you the best chance of getting the date and time you want.
Give Yourself Campus Time
Grand Park is a large campus. Give yourself enough time to park, walk to TreeRunner and complete check-in before your reservation.
Check Your Reservation Time
Event availability and start times can vary by date. Your online ticket selection is the best source for available reservation times.
View Hours & Pricing →
Weather & Park Conditions
Fall weather can affect park operations.
TreeRunner is an outdoor adventure park. Review our weather and rain policy before your visit, especially when fall conditions are changing.
View Weather & Rain Policy →
Fall Festivities FAQs
Before you head into the trees.
When is Wizarding World at Grand Park?
Wizarding World takes place September 18–19 and September 25–26, 2026.
When is HallowGlow at Grand Park?
HallowGlow runs October 2–4, 9–11, 16–18, 23–25 and 30–31, 2026.
Is HallowGlow every weekend in October?
Yes. HallowGlow takes place every weekend in October 2026. The first four weekends run Friday through Sunday, followed by Friday and Saturday on October 30–31.
Are Wizarding World and HallowGlow the same event?
No. They are two separate themed Night Forest experiences. Wizarding World takes place in September, while HallowGlow runs throughout October.
How old do you have to be to participate?
Aerial Forest participation begins at age 7. Course access and adult participation rules vary by age. Review our age guidelines before booking.
Is HallowGlow a haunted attraction?
HallowGlow is a themed nighttime TreeRunner climbing experience rather than a traditional haunted attraction. The focus remains on climbing, ziplining and enjoying the forest after dark.
Should I buy tickets ahead of time?
We recommend reserving ahead for special seasonal events so you can choose from the available dates and reservation times before they fill.
What happens if the weather is bad?
Weather can affect outdoor operations. Review our Weather & Rain Policy before your visit if conditions are uncertain.
Have a Question?
Talk to our Grand Park team.
Need help choosing a date or planning your visit? Reach out to TreeRunner Grand Park directly.
Which fall night are you climbing?
Start with Wizarding World in September, come back for HallowGlow in October—or make this the year you do both.