Fort MacMurray
1961 - 1,110
1971 - 6,681
1981 - 31,000 (boom census data unreliable due to transients and temporary housing)
1991 - 33,698
2001 - 30,000 - 40,000 (boom census data unreliable due to transients and temporary housing)
2011 - 61,374
2021 - 68,002
There is no reason, to my mind why places like Churchill and Iqaluit, Goose Bay and Gray's Bay, given the right circumstances, couldn't achieve similar growth. Yellowknife and Whitehorse both started as trading posts.
Once upon a time the entire white population of the lower mainland fitted inside a stockade at Fort Langley.
No city in Canada started with a divided highway servicing it.
The market imperative for the railroad to Vancouver in 1867 was just as obscure as that to Churchill. In fact the prospect for the Churchill route in 1867 was probably better tha that of Vancouver because the HBC had already started laying rail for wagonways at portage points to move both freight and York Boats.