What is it? The Grant Park Music Festival is a free, 10-week outdoor classical music series held every summer in Chicago’s Millennium Park, primarily at the Jay Pritzker Pavilion. Running from June 11 to August 16, 2025 , the festival features performances by the acclaimed Grant Park Orchestra and Chorus , along with world-renowned guest artists and conductors. With concerts happening most Wednesdays, Fridays, and Saturdays, the season includes standout pieces like Carmina Burana, Rhapsody in Blue, Boléro, and performances by violinist Joshua Bell . Seating on the Great Lawn and in parts of the Seating Bowl is free and first-come, while membership options are available for reserved seating.