Sally Miller Gearhart, a feminist, lesbian activist and prominent opponent of anti-gay policies whose writings included a classic of lesbian science fiction about a women-only society, much like the one she later founded in Northern California, died on July 14 in Ukiah, Calif.
She was 90. Deborah Craig, a friend and the producer of a forthcoming documentary film about Dr. Gearhart, confirmed her death.
Dr. Gearhart rose to prominence in the 1970s when she campaigned with Harvey Milk, a San Francisco city supervisor and the first openly gay politician elected in California, against Proposition 6, a ballot measure that would have banned gay and lesbian teachers from public schools.