OhCanadiana said:
You can see the list of border posts with immigration services on CBSA's website at http://www.cbsa-asfc.gc.ca/do-rb/services/imm-eng.html. Each office has its immigration services hours listed in the link with specific office info below the map.
It is far better to use the "Browse by Province/Territory" option instead of the above link. My partner landed in Victoria after flagpoling through Port Angeles, USA on the Coho ferry, a crossing that is not listed in the above link. Browsing by Province/Territory will show all available crossings.
