Quarterflash was an American rock group formed in 1980 in Portland, Oregon. The band was made up of Rindy Ross (lead vocals and saxophone), her husband Marv Ross (guitars), Jack Charles (guitars), Rick DiGiallonardo (keyboards/synthesizers), Rich Gooch (electric bass), and Brian David Willis (drums and percussion). Having a lead singer who also played the saxophone is one thing which made Quarterflash notable. In a 1982 interview, Rindy Ross said that she viewed the saxophone as an extension of her voice, enabling her to express things she could not express with her voice alone.

The group was formed by merging two popular Oregon bands, Seafood Mama and Pilot. Continuing under the name Seafood Mama, the band originally released the picture-sleeved single "Harden My Heart" on local private label, Whitefire Records, in the spring of 1980 (with the B-side track being "City Of Roses"). "Harden My Heart" was a big hit on Portland radio stations and got the band a one-hour TV special, Seafood Mama In Concert, on KOIN on June 5, 1980. "Harden My Heart" would later be rerecorded by the band after they renamed themselves Quarterflash. The name came from an Australian slang description of new immigrants as "one quarter flash and three parts foolish", which the Rosses found in a book at producer John Boylan's house.