Because of it's size, it wasn't possible to create this line before. 300 miles of terrain overwhelmed the 32-bit TransDEM, and the file sizes were too much for pre-TS12 to load. But now, it can be done!

The DEM files for the route are 4.6GB, and the route loaded into Trainz is just shy of 1GB.
The track was imported in to TrainsDEM via .kmz files from Andrew Brandon ( http://www.pacificng.com/ ), and the terrain is from MS Ortho photos (Google kept kicking me off after 6 files ;-P )
It's amazing what can be done with just a few evenings work!!
Now, detailing the line will take a lifetime, but hey; let's not worry about details like that....
Thanks, Dr. Ziegler!
Curtis