At first that sounds like a nuts thing to do.
And then you look at the map and you think, Oh! That's on the same latitude as Ireland. That's not so bad.
Nice long days in the summer, cool rainy maritime climate, lots of green grass. Cows love that!
And you'd be right!
A cool thing about ranching on islands in Alaska is in the winter, when there's less grass, is kelp season. Kelp loves the cold & kelp forests really get going in winter.
Then winter storms pull lots of it off its stalks and pile it onto the beach, where the cows can graze it.