No spring season in the pacific flyway...IIRC, I think freezeout is in the Pacific flyway.
I went to a lecture on snow geese by a Canadian Biologist, and again this is from memory, but I'm sure he said the snow geese that migrate on the pacific flyway are not part of the snow goose over-population problem. Apparently the P. flyway snows arent wrecking their nesting habitat like the ones in the central flyway.