Polk County HighPhotos: 2021 Polk County High School Graduation A gallery of photos from Polk County High School’s 2021 graduation, held at Tryon International Equestrian Center. Published June 17, 2021 Flipboard Reddit Pinterest Whatsapp Whatsapp Email A gallery of photos from Polk County High School’s 2021 graduation, held at Tryon International Equestrian Center.All photos by Jane Ollis. In this article: