I would love to hear more about this Canada.

discouraged from buying by the rulers of Canada

The Great Continental Divide

of the Americas?

It's a very nice map. Good work.But some of the borders should be corrected to serve the interest of both sides.What is the status of Canada in your time line?Is it ruled by Britain or France? Or is it independent perhaps?What is the main language of Canada? What European ethic group is dominant?I shall presume that everything is the same as in OTL, except the borders and will proceed to my points.1. Newfoundland in Columbia blocks the entrance to Gulf of St. Lawrence and to the St. Lawrence river, and effectively cuts off the main waterway to Canadian cities of Quebec, Montreal (right bank of the river) and Ottawa.Whoever ruled Canada in this time line, wouldn't reconcile with this kind of situation. Naval blockades and tariffs for navigating territorial waters were common thing back in the days.2. Alaska. As in OTL it would be all-or-nothing deal. Russian empire expanded from Europe to huge swathes of land in Siberia, and it just didn't have the manpower to assert control over the territory. There were no more colonist to send to Alaska, because all of them were sent to either Caucasus or Siberia. Russia expanded too quickly and over immense territory, and it just needed time to consolidate, before expanding further.One of the reasons why Alaska was sold was also the fear that UK would take it without compensation.3. Greenland. It was and it still is possession of the Danish Crown. Denmark had no interest in selling, and Columbia would have been. Greenland purchase would encroach Canada and put it in a position suitable for future annexation. Whoever ruled Canada in this time line, wouldn't reconcile with this kind of situation.4. Arctic islands. IMO, they would have remained with Canada, but I also don't see a reason why they should not go to Columbia, so it's actually not a remark, just a thought.5. Western border of Canada would have probably been drawn arbitrarily in accordance to some meridian, as it was the case in OTL. But, perhaps, just perhaps the border could follow