San Francisco marathon isn't generally regarded as an elite event, let alone "famous". Most metropolitan road races are around this price point. Especially pricier the closer you register to race-date.
But to your point, there are many smaller races that are cheaper. But often these are less organized, fewer road closures, less exciting, fewer perks; you get what you pay for.
But to your point, there are many smaller races that are cheaper. But often these are less organized, fewer road closures, less exciting, fewer perks; you get what you pay for.