Events Besides the Spring Art Tour (first weekend in June), we hold a quarterly auction/sale: Treasures from the Trollway… and beyond!. Check back to see our latest events. Treasures from the Trollway… and beyond! This is a quarterly event. See our schedule, below, and visit the auction site to see all of our treasures! Spring Art Tour 2021 This is MHAAA’s signature annual event. Held the first full Friday-Sunday in June, this year June 4-6.