Fright Nights at the Old Idaho Penitentiary
Haunted attraction · Boise · Idaho
The state's actual 19th century territorial prison turns into a haunted house for adults only nights each October, with actors working the old cell blocks and infirmary where inmates really lived and died. It bills itself as Idaho's only haunted cell house, and it is not exaggerating.
Don’t miss
Plan your visit
Color nearby peaks: October 15–October 19
Color builds from September 27 · mostly bare by November 7
Sampled at Fright Nights at the Old Idaho Penitentiary’s own coordinates and elevation (848 m) rather than a regional average.
Idaho is sampled at 42 weather points, then moved 1 day earlier so the model agrees with 1 published peak date from smokymountains.com. Idaho is running 2 days later than its own average this year. How the forecast works
When to go to Fright Nights at the Old Idaho Penitentiary
You get about 29 days of color here, from the first turn through to roughly October 26. Against Idaho overall, that is 7 days later. The 2,782 ft elevation accounts for most of the difference.
You will find it at Boise, ID, in Idaho. The venue has not published its 2026 dates yet, so check before you drive out.
Fright Nights at the Old Idaho Penitentiary on the map
Drag the date slider to see when color reaches this corner of Idaho, or tap a pin for that stop’s own peak window.
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Frequently asked
- When does Fright Nights at the Old Idaho Penitentiary peak in 2026?
- Peak color is predicted for October 15–October 19 (best estimate October 17). Color starts around September 27 and is mostly bare by November 7.
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