One of the biggest factor in gas prices in CA and the rest of the west coast is that much the oil comes from Alaska which is a more expensive source and then is

One of the biggest factor in gas prices in CA and the rest of the west coast is that much the oil comes from Alaska which is a more expensive source and then is refined in smaller west coast refineries that cost more to run. The result is an overall higher baseline cost for gasoline all along the US West coast.