I think we can safely claim Eastern Canada/US for the Latin Church. Alaska and other parts of the Western half could be up for debate.
California as well. The Spaniards were already there when the Russians made it to the northernmost edges of the California colonial presence. Missionary work outside Alaska would be mid 19th C, mostly. St. Peter the Aleut is claimed to have been Martyered by Jesuits in 1815…
… which is, itself, an interesting claim, for if in fact they were Jesuits, they were suspended, part of a suppressed order, and acting as such would make them disobedient, if not schismatic. And, unfortunately, not beyond the realm of possibility…
More likely, it was diocesans acting inappropriately, perhaps even laymen.
And also, properly, being from Kodiak, he’s almost assuredly Alutiq, not Aleut…
Missionary presence, however, wasn’t present in modern Oregon or Washington (then the nascent Oregon Territory) until the 1830’s or later… and the Latins got there about the same time. As did the protestants (sigh).