Taking her professional name from the beautiful Northern California county of her birth, American action heroine Marin Sais appeared in vaudeville prior to making her screen debut with the Vitagraph company in 1909. She became a star at the rival Kalem company, headlining several two-reel action series, including Stingaree (1915-1916) and The Girl From Frisco (1916-1917), both opposite True Boardman, and The American Girl (1917). A young cowboy from Oklahoma, Jack Hoxie, appeared opposite Sais in the latter and she became Mrs. Hoxie in 1920. As Jack's career began to take off in the mid-'20s, Marin's was rapidly declining. She often appeared in her husband's Westerns and, surprisingly, usually played villainesses. Increasingly blowsy, Sais turned to supporting roles and bit parts after the changeover to sound, almost always in B-Westerns. Working in obscurity for most of the next decade and a half, she enjoyed a brief renaissance in 1949 when cast as The Duchess in the long-running Red Ryder series of low-budget oaters. Retired from the screen since the early '50s, Sais later resided at the Motion Picture Country House and Hospital in Woodland Hills, CA.