US Visitors to Canada
The Canadian Government will open the Border on August 9 to US citizens who are fully-vaccinated using one of the 4 approved COVID-19 vaccines used in Canada. These are Pfizer-BioNTech; Moderna; Janssen (J&J); AstraZeneca.
The detailed announcement can be seen here.
Competitors wishing to cross the Border to attend the M242 Canadian Championships need to set up an account with, and fill in the, ArriveCAN website or App, which can be found here, per the Canadian Government announcement which says:
"Subject to limited exceptions, all travelers must use ArriveCAN (app or web portal) to submit their travel information. If they are eligible to enter Canada and meet specific criteria, fully vaccinated travelers will not have to quarantine upon arrival in Canada."