William Horncloud of Pine Ridge, South Dakota, is a well-known and respected traditional Sioux singer. He knows many of the old songs, and is sought after to perform and teach. He has travelled throughout the Northern Plains states to inter-tribal celebrations, and is well-known to audiences at the Flagstaff Pow-Wow and Sheridan All Indian Days. In 1970 he spent a number of weeks at Wesleyan University in Connecticut teaching Indian music.