Before entering Canada by car in 2026, the most critical step is ensuring you have the correct documentation. For U.S. citizens, a valid passport is the gold standard, though an Enhanced Driver’s License (EDL) or a NEXUS card is also acceptable. U.S. Permanent Residents must carry their Green Card. You should also gather your vehicle’s registration and proof of valid auto insurance, as border agents may ask for these. If you are traveling with children who are not your own, or if you share custody, you must have a notarized consent letter from the other parent(s) to prevent delays related to child safety protocols. Additionally, be prepared to declare all goods; items like firearms, cannabis (even if legal in your state), and certain food or plant products are strictly regulated or prohibited. While the ArriveCAN app is no longer mandatory for land crossings, checking the CBSA website for the latest "wait times" and duty-free allowances (currently up to 800 CAD for stays over 48 hours) will ensure a smooth transition through the port of entry.