Born in Cambridge, Massachusetts, Gail Mazur grew up in Auburndale, MA. She founded the Blacksmith House Poetry Series in Harvard Square which became, with its weekly readings, a center of poetry life, bringing national and international writers to read in a lively informal atmosphere. As an activist with her late husband, the artist Michael Mazur and others Massachusetts writers and artists, she co-founded, in 1968, Artists Against Racism and the War, and later they were activists for a Nuclear Freeze. Blacksmith House presented benefit readings for, among other issues.