Montana DUI Laws

Montana's DUI Laws and Conviction Penalties

Montana's DUI laws prohibit driving while under the influence of drugs or alcohol. Read more about how DUI is defined in Montana and the penalties you'll face for a first, second, and third conviction.

Montana's Boating Under the Influence (BUI) Laws and Penalties

Montana law prohibits operating a motorboat while under the influence of drugs or alcohol. The term “motorboat” means “a vessel, including a personal watercraft or pontoon, propelled by any machinery, motor, or engine of any description, whether or not the machinery, motor, or engine is the principal source of propulsion.” (Mont. Code Ann.

Montana Open Container Laws and Violation Penalties

Montana law prohibits any person from knowingly possessing an open alcoholic beverage container in a vehicle on a highway or public road. This restriction applies to all persons within the car, including the driver and passengers.

Montana’s DUI Implied Consent Law and Refusing Alcohol Testing

Montana's implied consent law requires all drivers who are lawfully stopped for driving under the influence to take a blood, breath, or urine test at the request of an officer