Portland International Raceway (PIR). Very nice track and relatively safe. By safe I mean most turns have quite a bit of run-off area before reaching any walls. ChampCar and American LeMans used to race here until the economy blew in 2008. Track day was run by MotoCorsa which is also the local Ducati dealer. That was their last track day for 2017. Most MotoCorsa instructors also race with OMRRA. I'm a member of OMRRA but just a corner-worker.
PIR Map
MotoCorsa