Home › Venues › Jack Mountain Amphitheater Jack Mountain Amphitheater Tickets Buy tickets for concerts at Jack Mountain Amphitheater in Seymour, MO. No Upcoming Events No upcoming events scheduled at Jack Mountain Amphitheater. Please contact us with any corrections. Hotels & Lodging Near Jack Mountain Amphitheater About the Venue Jack Mountain Amphitheater At-a-Glance Address2451 State Highway 0Seymour, MO 65746United States Map & Directions Advertisement