Sheila Varian was an American breeder of Arabian horses who lived and worked at the Varian Arabians Ranch near Arroyo Grande, California. She grew up with a strong interest in horses, and was mentored in horsemanship by Mary "Sid" Spencer, a local rancher and Morgan horse breeder who also introduced Varian to the vaquero or "Californio" tradition of western riding. She started her horse ranch, Varian Arabians, in 1954 with the assistance of her parents. Raising and training horses was her full-time occupation beginning in 1963. She used vaquero-influenced methods of training horses, although she adapted her technique over the years to fit the character of the Arabian horse, which she viewed as a horse breed requiring a smart yet gentle approach.
