Hello
Not based on a real place - at least not anymore.  I took the 30 meter Shuttle radar data for the North Shore of Lake Superior and accentuated the topography by 2000 meters or so using TransDEM - what a great program.  This ended up yielding a landscape that was like the European Alps but with smooth mountains.  I've been jacking them up with the 'mountain 2' tool as I go along for exposed rock.  
This is my first layout and I made everything much to BIG - it takes about 25  minutes at 75 km/hr to make one leg of the trip to the ore mines from  the shore.  This takes you above snowline to about 3000 meters or so.  I hope to have it set up as a loop so AI should be able to take the trains back and forth from the mines, to the yard, ore docks, then return leg.  
I have a harbor, open pit mines, and other industries mapped out but not completed - except for an ore dock modeled after the DMIR docks at Two Harbors Minnesota.  The pictures are from a section that is based loosely on the yard @ Proctor Minnesota with classification sections, two diesel maintenance areas, and an ore car sorting area.  I also made this to scale but for the game it also ends up being massive.  As a compromise I inserted small lakes into sections of the yard.  Modeled after Proctor if it were in Colorado somewhere that is.   
I feel that I'm now past the initial learning curve and can focus on finishing the scenery.  I'm going to have trouble figuring out the signals.  Using layers and seasonal textures I have a full summer/autumn/winter version of everything.
Chris