Mary McCaslin is an American folk singer-songwriter, known for her distinct Western musical style that blends elements of country, folk, and pop. Active primarily during the 1970s and 1980s, McCaslin's music is characterized by her clear, melodic voice and intricate guitar playing, often featuring open tunings. She is recognized for her role in the folk music revival of the period, with influential works including the albums "Old Friends" and "Prairie in the Sky". McCaslin's music has significantly contributed to the folk genre, particularly in its depiction of American Western themes.