A map of the Colorado counties as they appeared between 1988 (when Denver annexed the airport) and 2001 (when Broomfield county was created).
Based on the version from 17 December 2022 of File:Colorado county map, cb 500k.svg. Redrawn county lines informed by The Newberry Library.
Original work by User:Awmcphee. This version by User:WallAdhesion.