Our Ecoregion

My ecoregion, as defined by the EPA:

Level I: Great Plains

Level II: Temperate Prairies

Level III: Western Corn Belt Plains 

Level IV: Northwest Iowa Loess Prairies (47a)

The Western Corn Belt Plains is most of Iowa, up into Minnesota, scooping under Minneapolis into Wisconsin, west into Nebraska, and following the Missouri River through Kansas City halfway across Missouri. 

47a is called Northwest Iowa Loess Prairies lots of places, but crosses over into South Dakota north of Hawarden, and going north into Minnesota up to about Pipestone and around Sioux Falls and north a bit. Worthington is on the eastern border.

The Iowa DNR has a webpage about this ecoregion, including this info:

The Northwest Iowa Loess Prairies ecoregion is a gently undulating plain with a moderate to thick layer of loess. It is the highest and driest region of the Western Corn Belt Plains, as it rises to meet the Northern Glaciated Plains of the Dakotas. Although loess covers almost all of the broad upland flats, ridges, and slopes, minor glacial till outcrops occur near the base of some of the side slopes. Silty clay loam soils have developed on the loess. The area is mostly treeless, except for the more moist areas along some stream corridors and on farmstead windbreaks. The dominant land use is cropland agriculture with some pasture and cattle feedlots.