Key keywords: All Things Go Festival 2026, Hayley Williams, Mitski, Ethel Cain, indie alternative music festival, female-fronted music lineup, 2026 US music events, Merriweather Post Pavilion, indie rock headliners, inclusive music festivals After months of viral fan speculation and cryptic social media teasers, All Things Go organizers have officially unveiled the festival’s highly anticipated 2026 lineup, with Hayley Williams, Mitski, and Ethel Cain locked in as the three flagship headliners for the annual alternative music gathering. Set to run across September 5 and 6, 2026 at the iconic Merriweather Post Pavilion in Columbia, Maryland, the event is projected to draw more than 55,000 attendees over the two days, marking a 22% jump in expected turnout from the 2025 edition. All Things Go has built its decade-long reputation on centering underrepresented voices across indie, pop punk, folk, and alternative spaces, and 2026’s lineup stays true to that mission: 72% of the 42 booked acts are women, non-binary, or queer artists, a metric organizers say was a non-negotiable priority during curation. The three headliners were specifically selected to highlight cross-generational impact of marginalized creators in alternative music, per the festival’s official press release. Hayley Williams, best known as the frontwoman of Grammy-winning pop punk pioneers Paramore, has spent 20 years as a generational icon for emo and alternative fans, and her critically acclaimed solo work exploring indie and folk influences has expanded her audience far beyond her pop punk roots. Mitski, the Japanese-American indie singer-songwriter whose 2023 album *The Land Is Inhospitable and So Are We* earned three Grammy nominations and a No. 4 spot on the Billboard 200, has become one of the most influential alternative artists of the 2010s and 2020s, with a fiercely loyal global fanbase spanning teen listeners to long-time adult fans. Ethel Cain, the Southern Gothic Americana project of singer-songwriter Hayden Silas Anhedönia, exploded into mainstream consciousness with her 2022 cult classic debut *Preacher’s Daughter*, and has since become the face of a new wave of narrative-driven alternative music, selling out every headlining tour she has announced over the past three years. Early bird tickets for All Things Go 2026 go on sale October 18 at 10 a.m. EST, with general admission, VIP, and on-site camping packages available. Fans can sign up for pre-sale access on the festival’s official website now to secure first dibs before tickets open to the general public.