This data release is a collection of hydrologic characteristics of groundwater and surface water of selected lakes (Dry Lake #1 and #2, and Antelope Lake) within Clark County, South Dakota. The compiled data was broken into two parts, Reports and Maps, and GIS Data. The Reports and Maps dataset contains PDF reports, maps, and logs for aquifers, lake bathymetry, lithology, and observation wells near the selected lakes and for the entire county. The GIS datasets include publicly available data found on federal and state websites. The GIS Data is presented as comma separated value files, zipped folders with shapefiles, rasters, and a duplicate file geodatabase containing geodatabase tables, shapefile tables, and raster datasets.