This subproduct includes the input data and output data (i.e., results) of EPA's CBW-upst-shade-buffer-Calc program (ACE.409.4.2.10). These datasets and the accompanying readme file are stored separately on Zenodo (https://zenodo.org/records/16278599). The input data include stream temperature monitoring station information generated by EPA's CBW-cont-stream-temp-QC program (https://github.com/USEPA/CBW-cont-stream-temp-QC) and shade output generated by EPA's dmap-Rshade program (https://github.com/USEPA/dmap-RShade) for the Chesapeake Bay Watershed (CBW). The input data also includes 50m-spaced shade point coordinates that correspond to shade values. By applying the CBW-upst-shade-buffer-Calc program with the full input data, users have the ability to reproduce the riparian shade buffer results in the output data, providing method and data-transparency. The output datasets include average effective shade for various upstream distance and water travel time buffers for stream temperature monitoring sites across the CBW. The user also has the ability to use the shade results for their own purposes. This data product facilitates future development of regional stream temperature models that are needed by EPA and its regional partners in the mid-Atlantic to evaluate mitigation potential of forested riparian zones in order to protect cold-water stream habitat.