In 2024, the United States Geological Survey (USGS) compiled rock properties data from the USGS Core Research Center's (CRC) database for the Southwestern Wyoming Province and adjoining areas to better characterize the potential hydrocarbon sources and reservoirs in the area. Data from 53 wells were collected from data analysis results located in the CRC database. These data are derived from a combination of USGS and non-USGS laboratory analyses, with samples provided over several decades by researchers who accessed the CRC collection. The compiled data are from pre-Cretaceous Formations in the Southwestern Wyoming Province area. For each well, accompanying metadata details the sample sources, analytical methods, and quality considerations to aid in scientific analysis and public use.