Well, jwhoughton correctly identified California as the state, but local resident Jeff Tolan pinpointed the location of this shot of a portion of the narrow gauge Pacific Coast Railway in San Luis Obispo County.
In the first view the railroad has crossed Highway 223 and is headed towards Corbett Canyon, a much more friendly route and grade for a railroad. Exiting the canyon the PCRY will enter the town of Arroyo Grande. In the second picture the piles of a small bridge can still be seen as this photo was taken about ten years ago, before the trees grew so large as to totally obscure them.
Cheers,
Jack