-far northern Russia, close to the tundra (The location they're seeking isn't near any cities or towns at all, so as close as possible, at least. For purposes of plot, I can stick this mysterious location anywhere depending on where they'd get off the train.)
I highly doubt there would be routes between all these places, so they'd probably end up switching trains quite a bit. And getting off of trains that aren't exactly at the place they want to end up. Closest approximation, at least.
Also, how long would they spend traveling between Point A and Point B? And how long do they typically stop, if they stop? I need to know how long the routes would take.
Railroad operators and train names would also be appreciated, if they can be found.
Thanks for the help!