Amtrak Capitol Corridor map
Sharemap: Amtrak Capitol Corridor
Geospatial data sources: 

Open Street Map Data (ODbL) - http://www.openstreetmap.org/copyright
NORTAD - http://www.bts.gov/publications/north_american_transportation_atlas_data/
Natural Earth - http://www.naturalearthdata.com/
Jkan997