Ross was born in Hollywood, California, on January 29, 1940 (though many sources cite 1942 or 1943) when her Father, Dudley Ross, was in the Navy. He had also worked for the Associated Press. Her family later settled in Walnut Creek, California, east of San Francisco, and she graduated from Las Lomas High School in 1957. Ross was a keen horse rider in her youth and was friends with Casey Tibbs, a rodeo rider.