I live in a small, somewhat geographically isolated city that, among its many other positive aspects, is very GLBT-friendly. However, there's a very heavy emphasis on the letter "L" in the acronym. The population of lesbians in the region, especially older women (50+) of a more butch persuasion, is extremely high. By comparison, the population of gay men is quite low; higher than what might be found in a similarly-sized city elsewhere in the northeastern United States, but still far lower than the lesbian population.
Much has been written about the gay ghetto phenomenon; the attributes of cities and urban neighborhoods where gay men live in very large concentrations. I've seen no equivalent studies for the kinds of places lesbians are drawn to. Vacation spots popular among American lesbians (Provincetown MA, Palm Springs CA, etc.) are well-documented, but not places of permanent residence.
What do you think are the traits of communities that attract a large lesbian population? For the place where I live, I'm guessing it's the crunchy/hippie/earthy/back-to-the-land disposition of the area's culture (as opposed to just a liberal-leaning collective mindset or a "Stuff White People Like" urban culture), plentiful year-round outdoors recreational opportunities, and maybe the hilly rural environment that is a couple of minutes away.