Realtor Kevin Ho explains to Curbed SF, “Eureka Valley encompasses the broader real estate subdistrict of District 5…the city has many more micro-neighborhoods than the realtor maps dare depict and this is just one more example of that.” When asked to get more granular, Ho tells us the distinction between Castro and Eureka Valley with the following specifics: “Eureka Valley refers to the hillier, tree-lined streets…
Source: Why Do Some Realtors Use “Eureka Valley” Instead of “Castro”? – Curbed SF