Hey all, just a reminder that it is not specifically a PCR test that is required, but instead a molecular test, of which the PCR is one of many. The NAAT (Rapid test at Walgreens) is also molecular.
As for returning to Canada at the land border, if you are a Canadian citizen you cannot be denied entry, regardless of vaccination or even COVID status. You have to be let in, even if you do not have test results. You would most likely be ordered into quarantine without a test, and face hefty fines, but they can't prevent you from entering the country.