How long could marijuana be in my system?

It depends: It depends on how often you smoke it. With daily use, urine test can be positive up to 90 days. With less frequent use, less long.

LONG!: Marijuana is fat soluble so it can be detected in your system for up to 4-6weeks depending on your metabolism. So very important to avoid if you have to take a drug test! also can be detected in your hair for a real long time!