Can you bring weed on a cruise or vacation? Hotels, parks, road trips and borders

Can you bring weed on a cruise?

No. Carnival's policy explains why: cruise lines are required to follow US federal law, which prohibits possession and use of marijuana, so marijuana, including marijuana for medical purposes, is not allowed on board. Carnival adds that under federal law, all cruise terminals in the US are federal facilities and drug-free zones. Customs and law enforcement in US homeports and foreign ports can conduct routine and random inspections with narcotics-sniffing dogs, with zero tolerance for marijuana even from states that have legalized it. Guests found with it may face fines, arrest, and denial of boarding without a refund. Carnival also charges $500 per violation for smoking anything, including marijuana or a vaporizer, outside designated areas.

Royal Caribbean's prohibited items page is shorter: illegal drugs and illegal substances, including marijuana, are prohibited regardless of medical authorization or local legality, and prohibited items are denied boarding or removed from the ship. So "do cruise ships check for weed?" has a clear answer: customs officers with dogs can check the terminal, the ship can search, and the ports you visit have their own police.

Can you travel with weed from a legal state?

Only inside that state. The legal states we checked say so themselves: California's Department of Cannabis Control lists "take cannabis across state lines" under things you cannot do, and Colorado's health department says leaving the state with any cannabis product is against the law and that you cannot bring cannabis to Denver International Airport or any other airport. That is federal law showing through state websites. Flying has its own page, can you fly with weed, and the short version is the same: no in the US, within limits inside Canada, never across a border.

The pattern that works is to treat cannabis like a local product. Buy it where you are, use it where it is allowed, and do not pack it for the next leg.

Can you smoke weed in a hotel?

Only if the hotel allows it, and California's regulator says most hotels do not allow guests to use cannabis in their rooms. Two facts frame this. First, in the legal states we checked, use in public is illegal; the same regulator says you can use cannabis on private property but not in public places like restaurants or bars. Second, private property owners decide for their own property. Colorado's guidance says owners of private properties, including hotels, are allowed to ban cannabis possession and use, and that rental property owners and hotels have the right to do so. Expect a hotel's no-smoking rule to cover cannabis too, and expect a cleaning fee if you break it.

Practical version: read the policy before you book, ask the front desk rather than guessing, and assume balconies count as the room. If you want to use cannabis on a trip, a rental that says so in writing beats a hotel that does not mention it. A no-cannabis rule covers edibles and vapes too, not just smoke.

Can you use weed in national parks?

No, in any national park, in any state. Parks are federal land and the National Park Service enforces federal law there. Lassen Volcanic National Park's page says it directly: possession or use of any amount of marijuana is prohibited in the park, its facilities, concessions and campgrounds, and while California law allows limited possession and use, it remains an illegal drug under federal law, which is enforced within the park. The page makes no exception for medical cards. Colorado extends the same warning to national forests and ski slopes, and California's regulator lists national parks under places you cannot use or possess cannabis. Camping trip in a legal state? Check whether the campground is federal before you pack anything.

Road trips and rental cars

Inside a legal state, the car rules are mostly about packaging and use. The examples we checked agree: California bans an open container of cannabis while driving or riding; Colorado bans drivers and passengers from opening cannabis packaging and using it in a vehicle, even parked; British Columbia requires it sealed in original packaging or out of the driver's reach, such as the trunk. Keep it sealed, in the trunk, and never use it in the car. The full set of rules, including how long to wait before driving, is on driving high.

Rental cars add a contract on top, so read the rental agreement's smoking rule and cleaning fee before you drive off. And the state-line rule still applies on the highway: a road trip that crosses into the next state carries the product out of the state where it was legal.

Can you bring weed to Mexico, Canada or another country?

No, and this is where a vacation can turn into a criminal record. The rules at three common crossings:

Other countries can be harsher than any of these, and some, such as The Bahamas, ban CBD products too. Nothing with THC or CBD goes in a bag that crosses a border.

Using weed where it is legal on vacation

If your destination has legal stores, vacation can be the easiest place to try cannabis carefully. You need ID that proves you meet the local age limit, you buy from a licensed store, and you use it on private property that allows it. Three things change on a trip that catch people out. Products differ by market, so the gummy that was one size at home may be sold in another size here; read the label. Your routine is gone, so you may use more, earlier, with less food and more sun. And nobody around you knows your baseline. Start lower than you think, give edibles their full time to arrive, and keep our too high guide, US Poison Control (1-800-222-1222) and the local emergency number handy. New to all of it? Start with the first-time guide.

A simple vacation plan

1. Decide before you pack. If the trip crosses a state line, a border, a cruise terminal or federal land, nothing goes in the bag. Buy there if it is legal, or skip it this trip.
2. Check the carrier. The cruise lines we checked say no. Airlines are covered on the flying page. Trains and buses have their own rules; read them.
3. Know where you can use it. Private property that allows it, not public places, not hotel rooms unless the policy says yes, not parks or forests on federal land.
4. Plan the driving. Sealed and in the trunk, a sober driver after any use, and the waiting times on the driving page if you must drive later.
5. Leave the leftovers. Whatever you bought on the trip stays in that state or country. Use it, give it to a friend who lives there, or dispose of it before you head home.

Common questions