The Motor Mill Historic Site is a peaceful natural area that features a six-story limestone flouring mill and four related stone buildings on site dating from the late 1860’s. Motor Mill is located along the banks of the Turkey River in Clayton County, Iowa. The site has been owned and managed by the Clayton County Conservation Board since 1983. The Motor Mill Foundation a group of local volunteers, assists the board with planning, site development, preservation efforts, programming, and funding.
The site is open to the public throughout the year, though the interior of the mill is only accessible during tours. Tours are provided during the summer months and on several fall weekends. There is an updated tour schedule published each year. Group tours can also be scheduled outside the regular tours.