Montana Open Container Law (2026)

Open Container Law in states bordering Montana

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

• IdahoRestricted

  Idaho prohibits open containers of alcohol for the driver and for passengers, and opened containers must be carried in the trunk or behind the last upright seat (I.C. 23-505).

  Verified May 31, 2026 · Source: legislature.idaho.gov · Full Idaho rule →

• North DakotaRestricted

  North Dakota prohibits having an open or unsealed container of alcohol in the passenger area on a public highway; open containers must be kept in the trunk or an area that is not normally occupied (NDCC 39-08).

  Verified May 31, 2026 · Source: ndlegis.gov · Full North Dakota rule →

• South DakotaRestricted

  In South Dakota no person may consume or possess an open or unsealed alcoholic beverage in a vehicle on a public highway; the original seal must be unbroken. It is a Class 2 misdemeanor and applies to the driver and to passengers.

  Verified May 31, 2026 · Source: sdlegislature.gov · Full South Dakota rule →

• WyomingRestricted

  In Wyoming no person may consume, transport or possess an alcoholic beverage in a motor vehicle while it is in motion on a public street or highway unless it is: in the original unopened container with the seal unbroken; in the trunk or another outside compartment not readily accessible to anyone in the vehicle; in the unoccupied bed of a pickup out of the driver's reach; in an unoccupied rear compartment not normally occupied by passengers and not …

  Verified Jul 28, 2026 · Source: wyoleg.gov · Full Wyoming rule →