Day trips across the US-Canada border? Keep documents ready and expect questions.

Yes, you can cross both ways in one day. Just have your passport (or enhanced driver’s license or NEXUS card) handy, be honest about how long you were there, and don’t try to bring anything dumb back.

Border officers have heard every story. If you’re just popping over for lunch and cheap gas, say that. If you were shopping for a few hours, declare what you bought. They’re trained to spot nervous behavior, not people who forget to mention a six-pack of Molson.

The only real headache is if you’re crossing multiple times in the same day. Officers might ask more questions because frequent short trips can look like smuggling or working illegally. Be patient, keep answers short, and don’t crack jokes about bringing back a moose.

Also, know the duty-free limits. Alcohol and tobacco allowances reset every 48 hours if you’re returning to the US. For same-day crossings, you get nothing exempt. So don’t try to bring back a case of wine unless you’re ready to pay tax and duty.

One last thing: Check border wait times on the official apps before you drive—you don’t want to spend an hour in line for a sandwich.