Stonefield preserves and displays Wisonsin's agricultural and dairy heritage. Locations on-site include the State Agricultural Museum, which displays farm tools, machinery, and models; a recreated 1901 farmstead; a recreated rural farming village with more than 30 locations; the 1879 estate of Governor Nelson Dewey (1813-1889), first governor of Wisconsin; and the Stonefield Depot. Collection highlights include a Rumley Oil Pull; an 1896 McCormick Auto Mower, the oldest tractor in the U.S.; and the first rubber tire tractor.
The museum offers exhibits and self-guided tours. The farmstead offers self-guided tours, tours by costumed interpreters, and period rooms. The village offers period businesses and demonstrations of broom making, carpentry, and blacksmithing. The estate offers guided tours by costumed interpreters, self-guided tours, and period rooms. The depot is open for annual events. The site offers picnic facilities and snack sales. Field trips require reservations, and meet Wisconsin educational standards.