Leslie grew up in New Jersey and attended Skidmore College, where she studied painting. She won a scholarship from Skidmore to study dance with The Martha Graham School of Contemporary Dance in New York City. She also studied life drawing at the Art Student’s League and painting at Columbia University.

Between 1950 and 1963 Leslie Snow performed as a dancer on concert stage, on and off Broadway, with several companies including the Martha Graham Dance Co. and Charles Weidman Dance Co. and as a mime with The Mime Theater of Etienne Decrous. She taught dance at the Bath Academy of Art in Wiltshire, England, and the American School in London.

 In 1962, she married Louis Féron (1901 - 1998), goldsmith, sculptor and jeweler. She left the theater and teaching to return to painting, and moved to Snowville, Eaton, New Hampshire, the home of her ancestors, with her husband in 1967 where they lived and worked for the rest of their lives.

 Leslie Snow has exhibited in New York, Maine and New Hampshire in invitational and juried shows. Her paintings have been shown at Skidmore College, Plymouth State College, The Currier Museum of Art in Manchester NH, Hopkins Center, Hanover, and the Dartmouth Hitchcock Medical Center in Lebanon.  Her drawings and painting are represented in private collections in Europe and the United States.  Near the end of her husband's life, she started to write poetry.  She published two chapbooks, "Leslie Snow, Paintings & Drawings" and "Poems of Leslie Snow", and a book entitled A Voyage Remembered, With the Memoirs of Louis Féron.  She was a member of the Poetry Society of NH and The NH Writer's Project.