August in Boise and the Treasure Valley is peak summer festival season with the Western Idaho Fair, the 102nd Caldwell Night Rodeo, Nightfire Nationals at Firebird Raceway, the Albertsons Boise Open, and the Idaho Shakespeare Festival’s 50th-anniversary season under the stars, plus much, much more!
Here is everything happening across Boise, Meridian, Nampa, Caldwell, Eagle, Garden City, Kuna, and Star this August. Events are listed in chronological order.
San Inazio Basque Festival
The Basque Block, Boise
July 31st – August 2nd, 2026
Boise’s annual festival honoring St. Ignatius of Loyola, patron saint of the Basques — Oinkari Basque Dancers, pala games at the Anduiza Fronton, dancing with Amuma Says No, and a Sunday picnic at Municipal Park.
Boise Front Trail Festival
Bogus Basin Mountain Recreation Area, Boise
July 31st – August 1st, 2026
Two-day trail-running weekend at Bogus with a Friday-evening hill climb and Saturday morning 5-mile and 10-mile races on new 2026 courses. Proceeds benefit Ridge to Rivers.
Kuna Days
Bernie Fisher Park, Kuna
August 1st – 2nd, 2026
Kuna’s free community celebration by the Kuna Chamber — parade down Main Street, 5K, pancake breakfast, kids’ carnival, live music, mullet contest, lawnmower races, and fireworks.
Meridian Speedway – Speed Tour Super Modifieds Night
Meridian Speedway, Meridian
August 1st, 2026 | Evening
Marquee touring-series night at Meridian Speedway’s historic quarter-mile asphalt oval: Speed Tour Super Modifieds and Modifieds headline over Street Stocks and Hornets.
Tuesdays on the Creek – August Tuesdays
Indian Creek Plaza, Caldwell
August 4th, 11th, 18th & 25th, 2026 | 6pm – 9pm
Caldwell’s free summer concert series brings Cliff Miller Band (Aug 4), Dark Desert Highway + Mike Johnston Band (Aug 11), Ashley Wineland (Aug 18), and Orale! (Aug 25) to Indian Creek Plaza alongside the Farm to Fork Market.
Movies Under the Stars – August Lineup
Boise Parks, Boise
August 5th, 12th, 19th, 22nd & 26th, 2026 | At dusk
Boise Parks & Recreation’s free outdoor movie series in five different neighborhood parks: Finding Dory (Aug 5, Ivywild), The LEGO Batman Movie (Aug 12, Fort Boise), Rogue One (Aug 19, Julia Davis), The Wizard of Oz (Aug 22, Julia Davis), and The BFG (Aug 26, Molenaar).
Super Soaker Showdown
Indian Creek Plaza, Caldwell
August 6th, 2026 | 11am – 1pm
A splash-filled water battle where kids armed with Super Soakers face off against the Caldwell Fire Department for the summer’s biggest soak at Indian Creek Plaza.
First Thursday “Under the Tree” Art Walk
Downtown Boise, Boise
August 6th, 2026 | 5pm – 9pm
August’s edition of Boise’s long-running monthly art walk is themed “Under the Tree” as part of the city’s America 250 semiquincentennial celebration.
55th Annual Nightfire Nationals
Firebird Raceway, Eagle
August 7th – 9th, 2026
Firebird Raceway’s signature national event since 1972 — three days and nights of NHRA Hot Rod Heritage Series nitro racing with AA/Fuel Dragsters, Funny Cars, AA/Fuel Altereds, Pro Mods, and jet cars.
Boise Soul Food Festival
Julia Davis Park, Boise
August 8th, 2026 | 11am – 8pm
A free celebration of African-American culture with soul food, live music, dance, and community vendors in Julia Davis Park.
Idaho Vitality Festival
Julius M. Kleiner Memorial Park, Meridian
August 8th, 2026 | From 10am
A free health-and-wellness festival with 10+ expert talks, wellness vendors, and live demonstrations at Kleiner Park.
Boise Baroque – 2026 Summer Music Festival
Cathedral of the Rockies / Chateau des Fleurs, Boise & Eagle
August 8th, 9th & 22nd, 2026
Idaho’s premier Baroque orchestra presents a three-concert summer festival: “A Night in Spain” at Cathedral of the Rockies (Aug 8, 7:30pm), an outdoor picnic-on-the-lawn edition at Chateau des Fleurs in Eagle (Aug 9, 8:15pm), and the Baroque Institute high-school finale (Aug 22, 7:30pm).
39th Annual Nampa Festival of the Arts
Lakeview Park, Nampa
August 8th – 9th, 2026 | Sat 9am – 6pm, Sun 10am – 3pm
Free fine-art festival with 200 artisan booths, live music on multiple stages, kids’ activities, and food at Lakeview Park.
Boise Spartan Trifecta Weekend
Tom Pence Ranch, Payette
August 8th – 9th, 2026
Sprint 5K, Super 10K, Beast 21K, and Kids 1–3K obstacle-course races on Western Idaho’s high-desert terrain, with beer gardens and a festival finish area.
Athletic Club Boise vs. Sporting FC – International Friendly
Athletic Club Boise Stadium at Expo Idaho, Garden City
August 12th, 2026 | 7:30pm
AC Boise hosts Costa Rica Primera División side Sporting FC in the first pro-club international friendly in Boise’s new stadium.
Albertsons Boise Open presented by Chevron
Hillcrest Country Club, Boise
August 13th – 16th, 2026
The Korn Ferry Tour’s marquee Boise stop — four days of pro golf at Hillcrest Country Club plus three nights of post-round concerts.
City of Star Summer Concert Series at the Riverhouse
Star Riverhouse, Star
August 14th & 28th, 2026 | From 7pm
Free every-other-Friday summer concert series at the Star Riverhouse: Almost Famous (Aug 14) and Sweet Briar (Aug 28), with food and drink vendors on-site.
Downtown Meridian Car Show
Idaho Ave & 2nd St, Meridian
August 15th, 2026 | 10am – 3pm
A free classic and custom car show along Idaho Avenue in downtown Meridian.
Idaho Korean Festival
Julia Davis Bandshell, Boise
August 15th, 2026 | 10am – 1pm
A free family celebration of Korean heritage — traditional music and dance, Korean food, and cultural activities, presented by Idaho Kpop Stans.
Boise Water Lantern Festival
Julia Davis Park, Boise
August 15th, 2026 | 6pm – 10pm
A ticketed family event where attendees decorate a floating lantern and release it on the pond at sunset alongside live music and food vendors.
Idaho Shakespeare Festival – 50th Season (Sweeney Todd + The Winter’s Tale)
ISF Amphitheater, Boise
Through August 8th + August 14th – 29th, 2026
ISF’s 50th-anniversary season continues through August with two productions: Sondheim’s macabre musical Sweeney Todd: The Demon Barber of Fleet Street closes August 8, then Tracy Young directs Shakespeare’s late romance of jealousy, loss, and redemption in The Winter’s Tale (Aug 14 – 29).
102nd Caldwell Night Rodeo
D&B Supply Arena, Caldwell
August 18th – 22nd, 2026 | 7:30pm nightly
One of the top-10 PRCA rodeos in the country returns for its 102nd year — five nights of bull riding, bronc riding, and barrel racing.
Western Idaho Fair
Expo Idaho, Garden City
August 21st – 30th, 2026
Idaho’s biggest end-of-summer fair — ten days of carnival rides, livestock and 4-H exhibits, fair food, motorsports, and free grandstand concerts nightly Aug 24–28 with Brantley Gilbert, Skillet, Third Eye Blind, The Art of Rap featuring Ice-T and Sir Mix-A-Lot, and Lee Brice.
Wild River Dash (6th Annual)
Esther Simplot Park, Boise
August 22nd, 2026 | 9am – 1pm
Boise’s only paddle-and-run duathlon — a half-mile SUP or kayak across Quinn’s Pond plus a two-mile Greenbelt run (kid, teen, adult, and relay divisions). Benefits Wild Hearts Idaho.
Boise Art Museum – “Here We Have Idaho: Material Matters” Exhibition Opening
Boise Art Museum, Boise
Opening reception August 28th, 2026
The new BAM series showcasing Idaho-based artists opens with painter S. A. (Sharon) Jones — her Idaho debut after 50+ years of practice — alongside Boise State drawing and painting professor Astri Snodgrass.
Basque Museum Winefest
The Basque Block, Boise
August 29th, 2026 | 6pm – 9pm (21+)
Adults-only outdoor fundraiser for the Basque Museum & Cultural Center with nearly 100 wines, pintxos from Bar Gernika, Bardenay, The Basque Market, and Leku Ona, plus a Basque dance performance and online auction launch.
LESS Society Table Rock Run (3rd Annual)
Table Rock Trailhead, Boise
August 29th, 2026 | 8am
A 3.8-mile round-trip trail run/hike from the trailhead to the Table Rock summit with about 900 feet of climb, benefiting the LESS Society Idaho Scholarship Initiative.
Art Spark in Kleiner Park
Julius M. Kleiner Memorial Park, Meridian
August 29th, 2026 | 11am – 7pm
Meridian’s rebranded community art party — a full-day festival with a mainstage (Afrosonics 5:30–7pm), a food court, beer garden, hands-on art stations, chalk-art battles, and pop-up dance, theater, and spoken-word performances.
Warbird Roundup
Warhawk Air Museum, Nampa
August 29th – 30th, 2026
The Warhawk Air Museum’s annual two-day vintage military aircraft airshow, featuring warbirds from across the country flying and on static display, plus museum access, kids’ activities, and food trucks.
See you out there!
