What the Twin Falls County Fair and Magic Valley Stampede Is
The Twin Falls County Fair and Magic Valley Stampede PRCA Rodeo is a six-day late-summer fair at the Twin Falls County fairgrounds, 215 Fair Avenue in Filer. Organizers bill it as Southern Idaho's biggest event of the year, and the fair has run since 1916. The 2026 fair ran Wednesday, September 2 through Labor Day Monday, September 7. It combines a PRCA rodeo, a country concert, monster trucks, a carnival, livestock shows, exhibits and food vendors.
The Week at a Glance
| Day | What happened |
|---|---|
| Wed., Sept. 2 | Wednesday Night Junior Rodeo, including junior mutton bustin |
| Thu.-Sat., Sept. 3-5 | Magic Valley Stampede PRCA Rodeo, with Primetime Mutton Bustin before each performance |
| Sun., Sept. 6 | Country concert: Jo Dee Messina with special guest John Morgan |
| Mon., Sept. 7 | Monster trucks in Shouse Arena |
The Stampede is a three-night PRCA and WPRA rodeo in Shouse Arena featuring top-20 contestants, bucking stock, specialty acts and a giant video replay scoreboard. Rodeo performances replaced the old halftime mutton bustin with a specialty act.
Mutton Bustin: Ages and Rules
Mutton bustin is the fair's best-known youth event, and both versions filled up early.
- Wednesday Night Junior Rodeo mutton bustin: free, up to 60 riders, ages 4-8 as of January 1, under 60 pounds. Western attire is required, helmets are provided, and the top three get medals. It sold out by July 14.
- Primetime Mutton Bustin (new for 2026): before each Thursday, Friday and Saturday rodeo performance. Ten riders a night, $25 per rider (non-refundable, rodeo admission not included), same age and weight limits. Check-in is by 6:50 p.m. at the northwest end of the overhead stairway, and riding starts at 7:10 p.m. sharp. It sold out by June 23.
- Sign-up is online only, first come, first served, with waivers uploaded. Riders may enter both events. Night changes are not allowed, no-shows are not refunded, spurs are not allowed, and riders use a wool hold only. One helper per rider is allowed in the chute area.
Monster Trucks and Carnival
The monster truck show was Monday, September 7, in Shouse Arena. General admission ran 4:00-6:30 p.m. and included fair gate admission and the Pit Party from 2:30-3:30 p.m., and the show started at 4:00 p.m. Children 5 and under were free for general admission, and all sales were final. A pre-sale Carnival Combo was $32, good for fair gate admission and a carnival day, sold at the box office only. The carnival is run by Mighty Thomas Carnival, founded in 1928.
Tickets and Where
Online ticket prices include ticketing fees, and sales tax is added at purchase. The fair warns that tickets from unauthorized resellers are not guaranteed; buy from the fair, the box office, or 215 Fair Avenue, Filer, ID 83328. The fair office was open noon to 8 p.m., August 17 through September 7.
Questions
Who do I call?
The fair office and box office number is 208-326-4396.
Can my child ride a sheep?
Yes, if they are 4 to 8 years old, under 60 pounds and in western attire. Sign up online as early as possible, because both 2026 events sold out.
Is there a booklet?
Yes, a fair and rodeo booklet is published on the fair's website.
Official Links
- Magic Valley Stampede Rodeo
- Mutton Bustin rules and sign-up
- Tickets and pricing
- Twin Falls Chamber: 2026 listing
- Visit Southern Idaho: fair guide
Idaho County Fairs and Youth Livestock Shows: The Essentials
Idaho county fairs run from Lincoln County's July 20 to 25 fair to Nez Perce County's September 24 to 27 fair in 2026, with the Western Idaho Fair in Boise August 21 to 30, per RMAF listings. Dates may change.
Livestock shows
The Eastern Idaho State Fair in Blackfoot ran September 4 to 12, 2026, and hosts the state 4-H livestock judging contest, per the fair listing.
Ownership and entries
Statewide 4-H minimums are 70 days for lambs and goats, 100 for hogs and 150 for beef, per 4-H policies. The Western Idaho Fair's entries were due July 31, with a $50 late fee.
Next steps
Ask your county Extension office for your fair book, weigh-in dates and sale rules.
Weights, residency and sale rules differ by fair.
Read the full guide: Idaho County Fairs and Youth Livestock Shows
Other Upcoming Events Nearby
- Twin Falls County Farm Bureau Annual Banquet
Social hour and dinner for Twin Falls County Farm Bureau members at an event center downtown on November 13, 2026.
243 5th Ave S, Twin Falls, ID 83301 | Organizer: Idaho Farm Bureau Federation Official event details - Nez Perce County Farm Bureau Annual Banquet
Evening banquet for Nez Perce County Farm Bureau members at a Lewiston steakhouse on November 11, 2026.
2305 Nez Perce Dr, Lewiston, ID 83501 | Organizer: Idaho Farm Bureau Federation Official event details - Idaho County Farm Bureau Annual Banquet
Prairie farm and ranch families meet at the Cottonwood Community Hall for the Idaho County Farm Bureau banquet on November 12, 2026.
Cottonwood, ID | Organizer: Idaho Farm Bureau Federation Official event details - Valley-Adams County Farm Bureau Board Meeting
Board meeting for the Valley-Adams County Farm Bureau at the McCall insurance office on November 12, 2026.
401 S 3rd St, McCall, ID 83638 | Organizer: Idaho Farm Bureau Federation Official event details - Owyhee County Farm Bureau Board Meeting
Owyhee County Farm Bureau board meets the evening of November 12, 2026; the venue has not been announced.
Homedale, ID 83628 | Organizer: Idaho Farm Bureau Federation Official event details
Listing checked Nov. 11, 2026 against this source. Details can change; confirm with the organizer.