I thought this was a California Gull, but looking at the photo it looks a bit "off" to me - larger bill with no visible black mark, plus darker mantle. iNaturalist suggests Lesser Black-backed Gull, but I'm not sure given that the eyes look more like California Gull.
Handsome. Very politely begged for French fries. I did not feed it but it was such a beautiful bird I was very tempted.