As a native Sacramentonian, perhaps I can give you all some realistic places one might look to biuld a track?
How about making Sacramento Raceway Park into a road course facility?
Or perhaps an airport track from two shut down air force bases?
Mather Field
Or Mc'Clellan Air Force Base
Arco Arena Parking Lot
Sacramento International Airport
Raley Field
These are some of the areas where it would be easier to convert in to some sort of temporary or permanent race venue...
POST EDITED, FOR SOME REASON TERRASERVER DID NOT SHOW FULL IMAGES I TRIED TO LINK TO