While marijuana is legal in Washington state, there are still legal limits constricting how much you can possess and transactions involving the drug. For example, it is a felony to carry more than 40 grams of marijuana. The legal consequences of being caught with this amount of marijuana carry a penalty of $10,000 and up for 5 years in prison. Less serious drug charges involving marijuana can still leave a negative impact on your life. It’s illegal to be in possession of more than 1oz of marijuana, or for anyone under the age of 21 to be in possession of any amount of marijuana.