Cincy Blues Fest is an annual blues music festival, held on the banks of the Ohio River in Cincinnati, Ohio, United States. It is believed to be the largest all-volunteer blues festival in the U.S. Over the years it has showcased such acts as Lonnie Mack, Otis Rush, Clarence Gatemouth Brown, Lil' Ed & the Blues Imperials, Bobby Rush, Reverend Peyton's Big Damn Band, Watermelon Slim & the Workers, Slick Ballinger, the Chicago Allstars, Bob Seeley, Big Joe Duskin, Ricky Nye, and Sonny Moorman.