Yesterday, the White House confirmed that fully vaccinated visitors from Canada and Mexico will be welcomed at border crossings next month. White House officials did not clarify if people with mixed doses will be eligible to cross as the CDC is currently working on the guidelines.

Canada had opened its border to fully vaccinated Americans on August 9.

Source: https://www.ctvnews.ca/politics/canada-u-s-will-reopen-land-border-to-fully-vaccinated-visitors-in-november-1.5620929