Australia's biggest outback music festival has sold out its 2026 edition, with nearly 15,000 people expected to make the trip to the red dirt north of Broken Hill in New South Wales. The three-day camping festival runs August 20–22 at Belmont Station on the Mundi Mundi Plains, about 35 kilometres from Broken Hill. Billboard confirmed the sellout on August 3.

The 2026 lineup spans several generations of Australian and international acts: The Teskey Brothers, Jon Stevens, John Butler, Boy & Bear, Baby Animals, Jessica Mauboy, The Whitlams, Leo Sayer, Tim Finn, Troy Cassar-Daley, Chocolate Starfish, Mi-Sex, Furnace and the Fundamentals, Wendy Matthews, The Radiators, Shane Howard and Fanny Lumsden, according to Billboard. Missy Higgins, Hoodoo Gurus and Kate Ceberano are also on the bill, per the festival's Facebook page.

The Mundi Mundi Bash is an all-ages, dog-friendly, BYO festival — ticket holders can bring their own food and alcohol. Greg Donovan, founder and managing director of the Outback Music Festival Group, organises the event. It is supported by the NSW Government through its tourism and events agency, Destination NSW.

New for 2026 is Lightfest, a free three-night prelude staged on the streets of Broken Hill in the week before the festival. It features a large-scale drone light show and street programming, and forms part of the Transport for NSW Open Streets Program under the NSW Government's Vibrant Streets Package.

The festival has also replaced its previous Nutbush world-record attempt with the Bash Choir. On Friday, August 21, thousands of attendees will learn and perform Tina Turner's "The Best" in the main concert area, raising funds for the Royal Flying Doctor Service. Off-stage activities include the Big Blue Day map of Australia world-record attempt (raising funds for mental health charity Beyond Blue), the Mundi Undie Run (also for the Royal Flying Doctor Service), Mad Max dress-up, camel and helicopter rides, comedy, morning yoga, and dunny door painting.

The sellout comes despite a fuel crisis and broader cost-of-living pressures affecting consumer spending, Billboard reports. The festival has sold out consistently since launching during the Covid years.

The Mundi Mundi Bash has also absorbed some of the audience from a cancelled sister event. The 2026 Big Red Bash, held in Birdsville, Queensland, was called off after unprecedented rainfall and flooding left standing water at the festival site that would not dry in time. Organisers explored relocation within the Birdsville area but deemed it infeasible. Ticket holders were offered a refund, a transfer to the 2027 Big Red Bash (scheduled for July 6–8, 2027), or a transfer to the 2026 Mundi Mundi Bash, with a request deadline of June 19, 2026.

Time Out named the festival among the world's best music festivals for 2026, noting its remote desert setting as a standout.

For an event pitched as a camping trip with a world-class soundtrack, the draw is straightforward: three days in the outback, a deep roster of Australian talent, and the kind of off-stage chaos — camel rides, drone shows, mass choirs — that no city venue can replicate.