3:30 pm - 10:00 pm Cornstock Music Festival 2024! September 28 @ 3:30 pm - 10:00 pm Cornstock Music Festival 2024! Cornstock Music Festival Lake Garnett Garnett, Kansas Sept. 28th. Gates open at 3:30pm. Food/Beer/Beverages/Vendors. A lawn chair event. Free admission to kids ages 0-5. $35.00 – $65.00