This dataset contains whole rock geochemical data for volcanic rocks, both extrusive rocks of the western part of the Thunder Mountain volcanic field and hypabyssal dikes in the Stibnite-Yellow Pine district and in the Pistol Creek dike swarm, which are in central Idaho. Major oxides and trace elements are included, which are reported as percentages and parts per million, respectively. Major oxides are recalculated to a volatile-free total. Each data set has 58 or 60 single elements reported and 12 or 15 major oxides. Data file names are: Box_Challis_Volcanics_Geochemistry_ICP_ACID_FUS_and_WDXRF; Box_Challis_Volcanics_Geochemistry_ICP_AES_and_WDXRF; Box_Challis_Volcanics_Geochemistry_ICP_OES_and_WDXRF; and Box_Challis_Volcanics_Geochemistry_SHRIMP_geochron. Data are separated according to analysis method.