The map uses the azimuthal equidistant projection, centered on (-105.7167, 39.1333) (degrees latitude, longitude). The area outside the county is transparent, so it should look nice on non-white backgrounds.
Eventually, I will upload the 4 megabyte Metapost script I used to make this map. In the mean time, see Gore_Creek,_Colorado.mp.
I, the author of this work, hereby release it into the public domain. This applies worldwide.
In case this is not legally possible: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.