A backdated Marias Pass is now available on the Workshop. This route follows the same principles as my backdated Montana Hi-Line and uses an extra asset pack to transport the Marias Pass route half a century into the past. The target year is 1955, that's the ETT which I based my work on, but the scenery and track layouts should match a wider period from the 1940s into even the BN days*, when the semaphores got replaced on both sides of the pass. Of course, some (no, a lot!) of artistic license had to be taken in many places but overall I'm satisfied with the results.
*) if you squint and ignore all the old cars on the roads
To run this route, you'll need to own Marias Pass and also the Hi-Line DLC. Stevens Pass, though listed in the Workshop requirements, is only optional. I started with this project many years ago, soon after the release of Stevens Pass, but there should not be any critical assets in use from that DLC (mainly a few scenery items around Kalispell, I think).
I hope everythings works okay with this upload and that you'll enjoy the modified route. Please let me know if there are bad bugs or serious issues.
You can subscribe to the route on the Workshop via this link here below:
https://steamcommunity.com/sharedfiles/filedetails/?id=2050430868
There you'll also find a much more detailed description, the link to the manual, a a couple dozen screenshots.
A first (two-part) scenario is already available on my website. This is GN #2, the eastbound Empire Builder. It is based on the same timetable as the #2 scenario for the Hi-Line (and also uses same season/date settings in case anybody wants to do the complete run from Whitefish to Havre:
http://golden-age-rails.com/rwscnrio.html#greatnor
Cheers
Michael