The Midwest Old Threshers Reunion is an annual event that takes place in the small town of Mt. Pleasant, Iowa, United States, and runs for five days, ending on the Labor Day weekend. It was first held in 1950, and has taken place every year except 2020, when it was scrapped caused by the COVID-19 pandemic. When first started, it focused on steam engines and antique agricultural equipment, but has developed into an entertainment event with a wider remit. The tiny town of less than 10,000 inhabitants is invaded by many times that number of visitors, drawn from around the world.