From Dakota, taken Knaup Road west 1.5 miles to Hillcrest Road. This is a privately owned preserve.
Access is by permission only.
Its rich array of wildflowers includes pasqueflower, shotting star, fringed puccoon, measdow parsnip, cylindric blazingstar, and stiff, sky blue, and silky asters. Blocks of dolomite were fractured during the Wisconsinan glaciation and pushed along the land surface. Wirth Prairie occupies one of these ice shove features that are scattered throughout the area and covered with a thin mantle of till. From the intersection of Bus. Turn south of .25 mile.