No. No STCW in Puget Sound, BC or SE.
‘Inland” has different meanings for different purposes.
Places that are well inside the normal Inland/International demarcation line published in the CFRs, can, and do, elect to just use COLREGS instead of Inland Rules. For example: Bethel, Alaska is 100 miles upriver from the coast, but it’s under COLREGS.
Years ago there were separate: International Rules, Inland Rules, Pilot Rules, Great Lakes Rules, and Western Rivers Rules. Now just two sets of rules, Inland and International, with a few local variations. Now, there really isn’t much difference between the Inland and International Rules. Eventually, the entire US will all be International Rules with just a few local variations, as it should be.