Steam Threshing Day will be held on Friday, August 2 and Saturday, August 3 at IAHC from 9:00 am to 6:00 pm on Friday and 7:00 am until 3:00 pm on Saturday. The purpose of this show is to teach attendees how crops were grown and harvested during the late 19th and early 20th centuries. The Amish continue using many of these methods in their farming operations today. This show also continues to expand each year.

This year's show will feature oat threshing by steam, gasoline and horsepower. A Keck-Gonnerman Steam Engine will power a Keck-Gonnerman threshing machine. Threshing machines powered by horses and tractors will also be featured. Flailing of oats will be demonstrated as well. Oat straw will be baled by a John Deere Straw Press and a fanning mill will be in operation also. A grist mill will be operating making corn meal and brooms being made using broom corn grown on IAHC grounds.

Wood and lumber demonstrations will also be an attraction at the event. There will be buzz sawing and sawmilling powered by gas and steam power and field demonstrations of horse mowing, raking and loading of loose straw featuring a mechanical hay loader that is pulled by horses. Displays of antique farm machinery, tractors, early "hit and miss" gasoline engines and miniature steam powered displays will be there as well. Other demonstrations will include blacksmithing, horse shoeing, equipment powered by horse treadmills, broom and rope making. There will be bugg rides and a "train" will transport show goers around the grounds.

The highlight each day will be the Parade of Power featuring horse and mechanical powered equipment with commentary. Children's activities will include a petting zoo, pony rides and games.