All the communities of the Ross Valley are co-terminous, each abuts others. On the ground it is often invisible where one ends and another begins. Greenbrae, Corte Madera, Larkspur and Kentfield all have their own flavor of shopping, services and amenities. And then there are San Anselmo and San Rafael that are very close. Most folk use the whole shebang. I live in Mill Valley and often shop variously in the Ross Valley.