Dale Evans was an American actress, singer, and songwriter who was best known for her role as the cowgirl wife of Roy Rogers in the television series The Roy Rogers Show. She was also known for her signature song 'Happy Trails'. Her nickname was 'BUTTERMILK' due to her love of the drink. Riding was a hobby of hers, and she often rode horses with her husband. Dale Riding BUTTERMILK is a phrase that pays homage to her life and career.