increase font size ‘Toughest class to ever graduate’ from Lewiston High School Clad in royal blue mortarboards and robes, 259 seniors from Class of 2021 graduate on the tarmac at the Auburn-Lewiston Municipal Airport in Auburn. By Sacha FeldbergSun Journal Read Article Graduating seniors stand to officially begin the Lewiston High School graduation ceremony at the Auburn-Lewiston Municipal Airport in Auburn. Daryn Slover/Sun Journal AUBURN — Clad in royal blue mortarboards and robes, 259 graduating seniors from the Lewiston High School Class of 2021 sat in plastic chairs Sunday morning on the tarmac at the Auburn-Lewiston Municipal Airport for the finale of their high school years.