Watching the British show Great Railway Journeys last night I was startled when a guy in Alberta (Jasper/Banff NP) said that from Snow Dome the water flows to 3 oceans. So I knew that couldn't be right because Triple Divide Peak in Glacier NP (the Montana one) makes the same claim, and there can't be two different points that meet this criteria. As an aside at least in the US where I live, the continental divide between the Atlantic and Arctic oceans is called the "Northern Continental Divide" or "Laurentian Divide" as is shown in the green line here. The junction of the red and green lines is Triple Divide Peak in Glacier NP.
So looking into it more I see this other map of watershed divides, and I begin to realize that some people are placing Hudson Bay as part of the Atlantic Ocean! Surely that can't be right.