Immerse yourself in an electrifying evening of Chicago blues and charismatic performance with The Delta Sonics at the Longmont Museum’s Summer Concert Series on Thursday, July 24, 2025. Known for their infectious blend of swing, Delta, N’awlins R&B, and early rock ’n’ roll, The Delta Sonics deliver a full-throttle riverboat show complete with harmonica solos, slide guitar, and foot-stomping energy. Frontman Al Chesis commands the stage with dazzling showmanship and masterful harmonica, supported by a powerhouse backing of drums, bass, and slide guitars. This free family-friendly concert is held outdoors in the Stewart Family Courtyard—bring a lawn chair or blanket, enjoy light refreshments on-site, and soak in the music as Longs Peak provides the backdrop.