This data release contains 82.4-kilometer (km) long spatial profiles of geophysical and water-quality properties data acquired along five semi-continuous segments of the Trinity River that were surveyed August 28 – September 1, 2023. The surveyed reaches start at the Elm Fork confluence in the Dallas, Texas metropolitan area and end at a pump station in Scurry, Texas. The geophysical dataset consists of a spatial profile of waterborne self-potential (WaSP) voltages attributed to changes in electrical potential along the surveyed reach. The water-quality properties data consist of spatial profiles of temperature, specific conductance, turbidity, pH, oxidation-reduction potential, and dissolved-oxygen concentration measured in-situ in the surface water. The combined datasets consist of 78,745 measurements of WaSP voltages and water-quality properties, and the geospatial coordinates of each measurement.