Buttermilk's Rider is a term that refers to the combination of two famous American cowboys, DALE Evans and Roy Rogers. DALE Evans was an actress, singer, and songwriter who starred alongside Roy Rogers in many western films. Roy Rogers was a singer and actor who was known as the 'King of the Cowboys'. Together, they were known as Buttermilk's Rider, a reference to their horse Buttermilk. The crossword solutions for this term are EVANS (5 letters), DALE (4 letters), and DALEEVANS (9 letters).