This .zip file contains four products that will allow users to recreate the analyses and spatial data figures used in Sergeant et al. 2020, A classification of streamflow patterns across the coastal Gulf of Alaska: 1) Autoclass input and output files (provided as folders with multiple simple text files), 2) Classification data (.csv file) for individual watersheds, including Fundamental Daily Streamflow Statistics, landcover variables, and class membership, 3) Esri map package (.mpk file) that will allow users to recreate Figures 3 and 5 using ArcGIS and extract basic watershed-scale data such as watershed ID, drainage area, primary class assignment, and primary class membership probability (for users interested in extracting more information such as secondary class membership and landcover data, Watershed ID in this file can be cross-referenced with Watershed ID in the .csv file above), and 4) R Shiny Application (provided as a folder with app.R file and other supporting files) to create Figure 3 map and extract classification and land cover variables for individual watersheds (this is also viewable at: https://southeastakwatershedcoalition.shinyapps.io/watershed_classification/)