The "Santa Train" has been running on Clinchfield RR (now CSX) for 74 years past. This section of the Clinchfield is in the 'corners' of the KY VA TN area. This is a relatively famous Santa Train, and for the 50th anniversary in 1992 even UP's 3985 steam locomotive was the motive power (disguised as Clinchfield 676).
So given the relatively parsimonious behavior of EHH (now running CSX), I found it somewhat surprising that CSX has done work to rehabilitate a non-CSX owned "Clinchfield 800" and it is scheduled to be running running as the lead locomotive on this year's Santa train, and also with an SD45 painted as Clinchfield #3632.
Photo linked from, and story, here: [www.timesnews.net