Top left: Gaia WDs within 100 pc. Black points show all objects passing initial color and quality cuts. Red points show the cleaned sample, which is essentially complete at M_G < 14. Top right: spectroscopically classified WDs within 100 pc. Some of the substructure in the CMD is due to separation of DAs and DCs/DZs/DQs. Bottom left: gold points show our final analysis sample. Some substructure is visible even for spectroscopically confirmed DAs. Bottom right: mass estimates for DAs from spectroscopic ﹩\mathrm{log}g﹩. These are not used in our analysis, but are in good agreement with the overplotted photometric tracks.