Spring worked for many years as an activist devoted to causes such as disability rights, seniors, at-risk youth, poverty, the environment and animal rights. She used a wheelchair for much of her adult life due to rheumatoid arthritis.
Spring's successful candidacy for the Berkeley City Council in 1992 was a galvanizing event for the newly-qualified Green Party of California. She served on the Alameda County Recycling Board from 1997 to 2001, including a stint as its president in 2001. She was elected to her fifth, and last, term to the Berkeley City Council in 2006 with 72% of votes cast.
Her last act as a member of the city council was to seek medical attention for the tree sitters on the Berkeley oak grove controversy at the University of California, Berkeley.