Curious as to the farthest point north Cripps Pink apple has been grown and still produced mature fruit? I am in zone 5b generally first hard freeze is mid October. I know it is a late maturing apple.
I don't think there is quite a definitive answer on that, but it is said (an article in Goodfruit) that it ripens further north than was previously expected, It gets pretty good here in Z6 in a normal season. Spring was late this year so I will get an idea how it might do in a typical season in Z5. Won't know till Nov.
It can take a very hard freeze. Last year 25F didn't hurt it as far as I could tell.
Harvestman your Goodfruit reference lead me to some more sources. I see there are some new strains of Cripps Pink, "Maslin" is one of those. Supposedly it matures 3-4 weks earlier than the original Cripps Pink. Any chance you know of a supplier of Maslin for a non commercial grower?