The Haunted World
Haunted attraction · Caldwell · Idaho
Billed as Idaho's largest indoor-and-outdoor haunt, this attraction sprawls across more than 40 acres of Caldwell farmland west of Boise, pairing a themed haunted house with a corn maze that runs over a mile long. It has been scaring visitors since 2000, and a full walk-through takes roughly two hours on weekends.
Don’t miss
Plan your visit
Color nearby peaks: October 16–October 20
Color builds from October 3 · mostly bare by November 8
Method: daily ERA5 temperatures drive a photoperiod + chilling phenology model, sampled at The Haunted World’s own coordinates and elevation (743 m) rather than a regional average. Estimates, not promises — check locally before you plan a trip around it.
The Haunted World on the map
More things to do in Idaho
Teton Scenic Byway
Scenic drivePeak September 27
Idaho Highway 31 runs nearly 70 miles from Swan Valley to Victor over 6,754-foot Pine Creek Pass, its aspen and cottonwood turning gold each September against Teton Valley's farmland and the Tetons' quieter, western-facing side.
Don’t miss: Pine Creek Pass at 6,754 feet · Backside view of the Tetons
The Farmstead Corn Maze & Pumpkin Festival
Fall festivalColor nearby peaks October 17
The Lowe family's agritourism farm in Kuna, southwest of Boise, cuts a fresh corn maze each fall and opens a pumpkin patch alongside hayrides, a jumping pillow, cow-train rides and slides, all under one general admission. The 2026 season runs September 12 to October 31, open evenings midweek and closed Sundays.
Don’t miss: Fresh corn maze each year · Pumpkin patch and hayrides · One-price general admission
Ten Mile Farms
Corn mazeColor nearby peaks October 17
A Meridian farm just outside Boise running a corn maze with both a quick family route and a full sized version for anyone who wants to get properly lost. The pumpkin patch, hayrides, barrel train, and straw bale slides run six days a week from mid September through Halloween.
Don’t miss: Family and full-sized corn maze routes · U-pick pumpkin patch · Hayrides and barrel train
Fright Nights at the Old Idaho Penitentiary
Haunted attractionColor nearby peaks October 15
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: Real 1870s territorial prison · Terror on Cell Block 4 · 18-plus, photo ID required
Frequently asked
- When does The Haunted World peak in 2026?
- Peak color is predicted for October 16–October 20 (best estimate October 18). Color starts around October 3 and is mostly bare by November 8.
- What is The Haunted World best for?
- Treasure Valley thrill-seekers.
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