This table contains geochemical data collected for whole-rock samples from the Columbia River Basalt Group in the western Columbia River Gorge in Oregon and Washington. Most samples were collected by Russell C. Evarts and Richard M. Conrey from 2002 to 2014. Samples were collected during traverses along roads, streams, ridgecrests, and other areas as part of ongoing geologic mapping. Additional samples were provided by Marvin H. Beeson. Major- and trace-element analyses were performed by X-ray fluorescence at the Peter Hooper GeoAnalytical Laboratory at Washington State University in Pullman, Washington. No normalization has been applied to these data.