Definitely a Greater Canada Goose, if there was a very noticeable size difference then possibly a Lesser Canada
Branta canadensis parvipes which afaik winter in CA/Mexico and have relatively large cheek patches. If not a Lesser, possibly
moffitti which I think would be the resident Canada Goose for CA. To be honest, it is hard enough to identify any down to sub-species other than most extreme examples, let alone from an image of a single bird but range and separating Cackling from Canadas is a good start which can be done just on the bill size in this image.
Lesser
https://www.birdguides.com/species-guide/ioc/branta-canadensis-parvipes/
As a field note - when it comes to identifying sub-species of Canada or Cackling: It is difficult to tell size without a comparison image and there is often overlap between sub-species - there is also slight sexual dimorphism in size with females being smaller than male - also long necked birds have a habit of looking thick and short necked when relaxed!
