What is the easiest way to get from Portland Airport to the Portland Amtrak station?

I am looking for the easiest/quickest way to get from the Portland airport to the Amtrak station to catch a train.

Thanks!

take the Max train to the Rose Quarter transit center then take the #4 bus towards downtown. Get off at 3rd and Flanders and walk a couple block to the train

I agree with the first poster. The max train runs directly out of the airport. You will not even have to get wet. There will be transit guides around the baggage pickup area if you need guidance as well as clearly marked signs directing you to the max. When you get off the MAX at the Rose Quarter transit center there are a number of buses the #4, the #44, #17 and even more that are headed downtown. The buses will head over the steel bridge and you will see the train station off to your right as you pass over the river. A big train station with a big neon sign that says GO BY RAIL. This will give you some bearing as to where you will be walking to. As soon as you are over the river pull the cord to request the soonest stop and it will drop you off at 3rd and Flanders. Walk 3 short blocks north by northwest and there you are. The train station is really cool and historic looking. If you do get confused don't hesitate to ask someone for directions most people in Portland are very friendly but be a little guarded between the bus stop and train station as there are some people that will ask you for change but they are harmless for the most part.