The Outlaw Music Festival Maryland Heights brings country, folk, and Americana music to Maryland Heights, Missouri on August 18, 2026. Headlined by legendary Willie Nelson & Family, the festival features The Avett Brothers, Lukas Nelson, Stephen Wilson Jr, Sierra Hull, and Don Was & the Pan-Detroit Ensemble. This single-day country music festival showcases six artists spanning folk rock, rock, and Americana genres. The lineup focuses exclusively on American artists, delivering an authentic roots music experience for fans of traditional and contemporary country sounds.