This Scientific Data Release is for a spatial geodatabase containing hydrogeomorphic map units within the Neversink Reservoir Watershed, New York, formatted to Geologic Map Schema (GeMS) standards. Hydrogeomorphic map units within this data release are defined as areas with distinct topographic and hydrologic characteristics, which includes both surficial geologic deposits and regions of bedrock outcrop. Map units were identified and delineated using a combination of both field observations and remote sensing techniques, including deep-learning models for image classification, and visual analysis of terrain imagery from LiDAR-derived 1-meter resolution elevation models.