Even though smoking pot is legal in Washington State, and even though Washington likes tourism… Federal US boarder guards can ban you from entering the US for life if you admit to having experimented with pot in the past or if you say you plan on smoking it in Washington.
According to a statement from Customs and Border Protection spokesman Jaime Ruiz, “A violation, conspiracy to violate, or simply an attempt to violate any U.S. state, federal, or any foreign government controlled substance law renders a foreign national inadmissible to the United States.” That means, as per immigration law, if a foreigner tells border agents that he or she has consumed or plans to consume marijuana, even in jurisdictions where it’s legal, the result could be banishment from the country for life. – Men’s Journal
If the border guards trip you up…your party is over and you could be banned for life. You then need to apply for a waiver which is a process that may require a lawyer, and will run you a $585 filing fee plus your legal fees. And that process needs to be repeated every year to five years…for life. Makes going to a Mariners game a costly adventure.