Status of Aviation Trail sites regarding visitors during the COVID-19 precautions: Status on Dayton Aviation Heritage National Historical Park buildings as of December 3. All indoor facilities closed. See below. Updated March 10, 2021: This list was first compiled on March 16, 2020 and has been periodically updated as status changes are announced. Status is subject to change on a day-to-day basis. Before traveling to a site on the Aviation Trail, please verify that site’s sta