On April 15, 2010, about 1745 central daylight time, an amateur-built Kitfox 4 airplane, N421KF, piloted by a private pilot, sustained substantial damage while approaching to land at the Baraboo Wisconsin Dells Airport (DLL), Baraboo, Wisconsin. The airplane was being operated under 14 Code of Federal Regulations Part 91 and was in visual meteorological conditions without a flight plan. The pilot received serious injuries. The flight originated from the Poplar Grove Airport, Poplar Grove, Illinois, at an undetermined time and was en route to Stevens Point, Wisconsin. The pilot reported that adverse weather had moved into the area and he diverted to DLL. The pilot said that during the landing approach, the aircraft stalled due to a wind gust, lost altitude, and struck the ground. The winds at DLL about the time of the accident were 250 degrees at 13 knots gusting to 23 knots.