Home › Venues › Marathon Park Amphitheater Marathon Park Amphitheater Tickets Buy tickets for concerts at Marathon Park Amphitheater in Wausau, WI. No Upcoming Events No upcoming events scheduled at Marathon Park Amphitheater. Please contact us with any corrections. Hotels & Lodging Near Marathon Park Amphitheater About the Venue Marathon Park Amphitheater At-a-Glance Address1201 Stewart AvenueWausau, WI 54401United States Map & Directions Advertisement