September Slam Demo Derby
- Date
- Saturday, September 12, 2026
- Time
- 7:30 p.m. – 11:00 p.m.
- Location
- Eastern Idaho State Fairgrounds, 97 Park Street, Blackfoot
- Cost
- Free
Combining classic cars with creative driving and mud, the Derby never disappoints the packed grandstand arena. There is only one rule for the Derby: keep moving . . . if they can. No matter how we say it, the Demolition Derby is still one of the most exciting events of the Fair.