Wilco returns to MASS MoCA with Solid Sound 2026 — three days, four stages, with multiple Wilco headlining sets including a special Mermaid Avenue performance with Billy Bragg. Lineup also features The Breeders, Gang of Four, S.G. Goodman, L'Rain, plus John Hodgman's Comedy Cabaret with Jo Firestone, Demi Adejuyigbe, and Jordan Klepper. Festival is sold out; verified resale is live. Massachusetts is a recreational-legal state for adults 21+, but consumption on the festival grounds and surrounding state land is prohibited — handle private accommodation accordingly.