Routes are located here: C:\Program Files (x86)\Steam\steamapps\common\railworks\Content\Routes
However, they use 'coded' (can't think of a better name) names. IE: Here is the name for the default Barstow - San Bernardino Route as it appears in the Routes folder:
76b3a3f0-c9b0-48f2-9eff-1af9b00166d6 In that folder is everything the route uses.
You need
RW_Tools (don't know of another program) to see what each route is called in-game. And you can use the program to back things up.