This resource is a compilation of borehole temperature observation data provided by the Maryland Geological Survey. The data are available in the following formats: web feature service, web map service, ESRI service endpoint, and an Excel workbook for download. The workbook contains 6 worksheets, including information about the template, notes related to revisions of the template, resource provider information, the data, a field list (data mapping view) and a worksheet with vocabularies (data valid terms) used to populate the data worksheet. This resource was provided by the Virginia Department of Mines, Minerals, and Energy, Divison of Geology and Mineral Resources and made available for distribution through the National Geothermal Data System.