The Inland Empire Jazz Festival Inc. Presents: The Inland Empire Jazz Festival Charity Weekend to benefit Operation REAPP Ontario, CA Operation REAPP a non-profit 501c3 invites you to the 2nd Annual Inland Empire Jazz Festival on October 3-5 for a Charity Weekend. The event will be held at Ontario Mills Mall in Ontario, CA The Inland Empire Jazz Festival is more than a music festival. It defines education, cultural awareness, economic development, charity and community as it strives to unify all entities of a diverse region as “The IE.”