I am trying to find this route but without success. I've searched the download station and content store, and even did an internet search. I did find a thread in the forum with some great screenshots.
If you wish to you can run Twin Peaks Timber Co. RR on the Port Tillamook route. There are versions on the DLS of the route for both TANE and TRS19 by stouthm which he adapted from the original route by madtrainz14 from the DEM by dermmy.
Lots to keep your RR busy. although you may wish to remove stouthm's rolling stock from the route before you get started.