Summer Camp Music Festival returns to Chilicothe, Illinois from May 21-24, 2026, featuring an eclectic lineup spanning electronic, hip hop, funk, pop, and rock genres. The four-day festival is headlined by legendary rock band Toto, electronic duo Big Gigantic, jam band STS9, and hip hop artists Three 6 Mafia and 2 Chainz. Notable performers include funk outfit Lettuce, bluegrass acts Greensky Bluegrass and Yonder Mountain String Band, plus electronic artists Maddy O'Neal, SunSquabi, and Manic Focus. With 43 total artists representing diverse musical styles, Summer Camp offers a comprehensive festival experience for fans of multiple genres.