 The Minnesota River flows southeastward along the county's NE border, creating Marsh Lake and Lac qui Parle Reservoir The Minnesota River flow is augmented by Yellow Bank River near the county's north corner, and by Lac qui Parle River near the county's east border.The south fork of the Yellow Bank flows northward through the west portion of the county, and meets the north fork of the Yellow Bank in the north end of the county; the combined flow discharges into the Minnesota at the county's NE border.The Lac qui Parle flows eastward through the lower portion of the county, discharging into the Minnesota near the community of Lac qui Parle.