Summer’s last full month in the Treasure Valley always goes out with a bang — literally, if you count the fireworks over Caldwell Night Rodeo. August 2026 brings the return of the Western Idaho Fair, ten straight days of rodeo action in Caldwell, weekly farmers markets and movie nights across the valley, and a concert calendar packed with everything from Shinedown to Cat Power. Whether you’re squeezing in one more summer festival before the kids head back to school, or looking for a weeknight food-truck-and-live-music fix, there’s something happening in nearly every Treasure Valley community.
Below is your complete guide to events in the Treasure Valley in August 2026, organized by category and searchable by city. Bookmark this page and come back often — we’ll keep it updated as details are confirmed.
Marquee Events: Western Idaho Fair & Caldwell Night Rodeo (2026)
August’s two biggest draws both land in the back half of the month, and together they define late summer in the valley:
- Western Idaho Fair 2026 — Friday, August 21–Sunday, August 30 | Expo Idaho, Boise
- Caldwell Night Rodeo 2026 — Tuesday, August 18–Saturday, August 22 | Caldwell
- Caldwell Night Rodeo Kickoff — Saturday, August 15 | 6:00 PM–9:00 PM | Indian Creek Plaza, Caldwell
- Caldwell Night Rodeo Watch Party — Friday–Saturday, August 21–22 | 6:00 PM–10:00 PM | Indian Creek Plaza, Caldwell
Concerts & Live Music in the Treasure Valley — August 2026
From arena headliners to intimate downtown venues, August is stacked with live music:
Ford Idaho Center (Nampa)
- Simple Plan — Sunday, August 2 | 6:00 PM
- Lindsey Stirling — Tuesday, August 4 | 7:00 PM
- 311 and Dirty Heads — Tuesday, August 11 | 4:30 PM
- The Black Crowes & Whiskey Myers — Wednesday, August 12 | 5:30 PM
- Men at Work & Toad the Wet Sprocket — Thursday, August 13 | 6:00 PM
- OAR: Three Decades Tour — Friday, August 14 | 5:30 PM
- Ty Myers — Saturday, August 15 | 6:30 PM
Extramile Arena (Boise)
- Shinedown — Monday, August 10 | 7:00 PM
Revolution Concert House (Garden City)
- Interpol — Monday, August 3 | 7:00 PM
- Rio Da Yung OG — Wednesday, August 12 | 7:00 PM
- Soul Asylum — Wednesday, August 19 | 7:00 PM
- Mickey Avalon — Friday, August 21 | 7:00 PM
Knitting Factory (Boise)
- The Strike — Saturday, August 1 | 7:00 PM
- Chiodos — Monday, August 3 | 6:30 PM
- Pepper and The Movement — Thursday, August 6 | 6:30 PM
- Keller & the Keels — Saturday, August 8 | 7:00 PM
- Too Close For Comfort — Thursday, August 13 | 6:30 PM
- Cat Power — Friday, August 14 | 7:00 PM
- The Sword & Red Fang — Tuesday, August 25 | 6:30 PM
- Gigi Perez — Wednesday, August 26 | 7:00 PM
Treefort Music Hall (Boise)
- Ani DiFranco w/ Valerie June — Thursday, August 6 | 7:00 PM
- STS9 — Thursday, August 13 | 7:00 PM
- The Hip Abduction w/ Coyote Island — Monday, August 17 | 7:00 PM
- Greensky Bluegrass — Tuesday, August 18 | 7:00 PM
- HATEBREED w/ Terror, Incantation & more — Tuesday, August 25 | 4:00 PM
- The Garden w/ Her New Knife — Saturday, August 29 | 7:00 PM
Other Boise & Nampa Venues
- Meridian’s Main Street Mix — Wednesdays, August 5 & 12 | 5:30 PM–7:30 PM | Meridian
- Neighborhood Concert Series — Wednesdays, August 5, 19, 26 | 5:00 PM | Catalpa, Elm Grove & Bear Creek Parks, Boise
- Sweeney Todd — Idaho Shakespeare | August 1–8 | 7:30 PM
- The Winter’s Tale — Idaho Shakespeare | August 14–29 | 7:30 PM
- Music Theatre of Idaho: Something Rotten — Nampa Civic Center | August 20–22
- Esther: An Instrument of Peace — Nampa Civic Center | Saturday, August 29 | 4:30 PM
Festivals & Community Events — Treasure Valley August 2026
Beyond the fair and rodeo, the valley’s late-summer calendar is full of one-day festivals and community celebrations:
- Kuna Days 2026 — Saturday, August 1 | Kuna
- Celebrate Hope: St. Luke’s Charity Day — Saturday, August 1 | 12:00 PM–4:00 PM | The Village at Meridian
- 39th Annual Nampa Festival of the Arts — Saturday–Sunday, August 8–9 | 9:00 AM–3:00 PM | Lakeview Park, Nampa
- Boise Soul Food Festival — Saturday, August 8 | 11:00 AM–8:00 PM | Julia Davis Park, Boise
- Boise Card and Collectible Show — Saturday, August 8 | 10:00 AM–5:00 PM | Nampa Civic Center
- 2026 Juniper Market Street Fair — Saturday, August 8 | 10:00 AM–8:00 PM | The Village at Meridian
- Boise Water Lantern Festival — Saturday, August 15 | 6:00 PM–10:00 PM | Boise
- Idaho Paint Horse Club Event — Saturday–Sunday, August 1–2 | 8:00 AM | Ford Idaho Center, Nampa
- Snake River Reining Equine Event — Friday–Sunday, August 7–9 | 8:00 AM | Ford Idaho Center, Nampa
- Idaho Cutting Horse Derby / Show — Monday–Thursday, August 17–27 | 8:00 AM | Ford Idaho Center, Nampa
- Boise Athletic Club Matches — Saturdays, August 1, 8, 15 | 7:30 PM | Expo Idaho, Boise
- August Third Thursday — Thursday, August 20 | 6:00 PM–9:00 PM | Downtown Nampa
- Sunshine & Soundbites — Friday, August 21 | 5:00 PM–8:30 PM | Nampa
- Meridian Community Art Party / Art Spark — Saturday, August 29 | 11:00 AM–7:00 PM | Kleiner Park, Meridian
Family-Friendly Events in the Treasure Valley — August 2026
Squeezing in the last of summer break? Here are the best family-friendly picks for August:
- Big Cat Day — Zoo Boise | Sunday, August 9 | 10:00 AM–2:00 PM
- Wild After 5:00 — Zoo Boise | Tuesday, August 11 | 5:30 PM–8:30 PM
- Tuesdays On The Creek — Indian Creek Plaza, Caldwell | Tuesdays, August 4, 11, 18, 25 | 6:00 PM
- Knitting and Yarn on the Plaza — Indian Creek Plaza, Caldwell | Wednesdays, August 5, 12, 19, 26 | 9:30 AM–1:00 PM
- Creekside Kids Summer Bash — Indian Creek Plaza, Caldwell | Wednesday, August 5 | 5:00 PM–8:00 PM
- Super Soaker Showdown — Indian Creek Plaza, Caldwell | Thursday, August 6 | 11:00 AM–1:00 PM
- Meridian Sparklight Movie Night — Meridian | Friday, August 7 | 7:00 PM–8:00 PM
- Nampa Silver Screen on the Green — Nampa | Friday, August 14 | 8:00 PM–11:00 PM
- Boise Movies Under the Stars — Boise | Friday, August 21 | 9:00 PM–10:00 PM
- Summer Movie Night: Remember the Titans — Indian Creek Plaza, Caldwell | Thursday, August 27 | 6:00 PM–8:00 PM
- 18th Annual Nampa Pooch Party — Nampa | Saturday, August 29 | 8:00 AM–1:00 PM
Stay Active: Outdoor & Fitness Events — August 2026
- Line and Swing Dancing at the Farm — The Farm, Garden City | Saturdays & Wednesdays throughout August
- Morning Polynesian Dance Classes — The Village at Meridian | Saturdays, August 8, 15, 22, 29 | 9:00 AM–10:00 AM
- Dirt Road Line Dancing @ Big Al’s — The Village at Meridian | Fridays, August 7, 14, 21 | 6:00 PM–7:00 PM
- Phorm Shakeout Run — Kristin Armstrong Park, Boise | Friday, August 7 | 5:30 PM
- Wild River Dash Duathlon — Quinn’s Pond, Boise | Saturday, August 22 | 9:00 AM
- 3rd Annual 5KIC LESS Society Table Rock Hike — Table Rock, Boise | Saturday, August 29 | 8:00 AM
- Boise Sunrise Wish Run — Boise | Wednesday, August 26 | 6:00 AM
Treasure Valley Farmers & Weekly Markets — August 2026
Local produce, food trucks, and handmade goods pop up all over the valley every week in August:
- Farm to Fork Farmers Market — Indian Creek Plaza, Caldwell | Tuesdays | 5:00 PM
- Meridian Monday Night Market — Meridian | Mondays | 4:00 PM–9:00 PM
- Sunday Market @ Storey Park — Meridian | Sundays, August 2 & 16 | 10:00 AM–4:00 PM
- West Bench Farmers Market — Boise | Thursdays | 5:00 PM–9:00 PM
- Boise Flea Market — Boise | Sundays, August 9 & 30 | 10:00 AM–4:00 PM
Frequently Asked Questions About August 2026 Events in the Treasure Valley
What are the biggest events in the Treasure Valley in August 2026?
The Western Idaho Fair runs August 21–30 at Expo Idaho in Boise, and the Caldwell Night Rodeo runs August 18–22, with a kickoff party at Indian Creek Plaza on August 15 and watch parties August 21–22. These two events anchor the month for most Treasure Valley families.
What concerts are happening in the Treasure Valley in August 2026?
Ford Idaho Center in Nampa hosts Simple Plan, Lindsey Stirling, 311 and Dirty Heads, The Black Crowes, and OAR, among others. Shinedown plays Extramile Arena on August 10, and Interpol, Cat Power, and Greensky Bluegrass headline shows at Revolution Concert House, Knitting Factory, and Treefort Music Hall throughout the month.
What family-friendly events are in the Treasure Valley in August 2026?
Top picks include Big Cat Day and Wild After 5 at Zoo Boise, weekly kids’ programming at Indian Creek Plaza in Caldwell, outdoor movie nights in Meridian, Nampa, Boise, and Caldwell, and the 18th Annual Nampa Pooch Party on August 29.
What festivals are happening in the Treasure Valley in August 2026?
Kuna Days and the Celebrate Hope Charity Day both kick off the month on August 1. The Nampa Festival of the Arts and Boise Soul Food Festival both take place August 8, and the Boise Water Lantern Festival lights up the sky on August 15.
Where are the weekly farmers and flea markets in the Treasure Valley in August 2026?
The Farm to Fork Farmers Market runs Tuesdays in Caldwell, the Meridian Monday Night Market runs weekly, the West Bench Farmers Market runs Thursdays in Boise, and the Boise Flea Market pops up two Sundays in August.
What outdoor and active events are happening in the Treasure Valley in August 2026?
Active options include the Wild River Dash Duathlon at Quinn’s Pond on August 22, the Table Rock hike on August 29, the Boise Sunrise Wish Run on August 26, and weekly dance classes at The Farm in Garden City and The Village at Meridian.