Joining the California bar Foltz wanted to take the bar examination but California law at the time allowed only white males to become members of the bar. Foltz authored a state bill, known as the "Woman Lawyer Bill", which replaced "white male" with "person", and in September 1878 she passed the examination and was the first woman admitted to the California bar, and the first female lawyer on the entire west coast of the United States. Having little formal education, she wished to study at the first law school in California to improve her skills. Alongside her ally
Laura de Force Gordon, Foltz applied to
Hastings College of the Law but was denied admission because of her sex. Foltz and Gordon sued, but recognized that they faced strong opposition. To advance their cause, Gordon and Foltz wrote an amendment to the California state constitution that read "No person shall, on account of sex, be disqualified from entering upon or pursuing any lawful business, vocation, or profession." Drawing upon both the Woman Lawyer Bill and the soon-to-be-ratified equal opportunity in employment statement in the constitution, Foltz and Gordon were able to argue that if women could serve as lawyers they must certainly be allowed to attend law school at the coeducational University of California.
Chief Justice of California Robert F. Morrison agreed, and in
Foltz v. Hoge ruled that Foltz and Gordon should be admitted to Hastings. The ruling was appealed, and Foltz studied for and passed the California State Supreme Court bar exam in order to argue her case, which she ultimately won. Although Foltz successfully obtained admission for all qualified women to Hastings, the work to win the case left Foltz impoverished and she returned to her legal career instead of pursuing her dream of attending law school.
Later career Foltz practiced in San Francisco, San Diego, and from 1896 to 1899 in New York, where she attempted to create a career as a corporate attorney. After the
1906 San Francisco earthquake and subsequent fires, Foltz was left without a home or office. She relocated to Los Angeles, where she worked for two more decades. ==Political career==