There are many train trackers out there such as Heritage unit tracker, Conrail tracker, GTW tracker, and probably many more. So far, I have not found one for Santa Fe units. I have decided to start a tracker for everything that wears Santa Fe colors (Bluebonnet and Warbonnet). Everyone is welcome to report Santa Fe units. If you spot an ATSF unit, post the report in the comments section of my Facebook page. Here is the page: https://www.facebook.com/pages/Santa-Fe-Tracker/242260315932907. If you choose to do so, please include the following: Unit number, the location of the unit, the direction, and the date.
Here is my gallery of ATSF units