In 1936 she starred in three cliffhanger serials, The Black Coin, The Amazing Exploits of the Clutching Hand, and Custer's Last Stand.

She played the female lead in a few B-westerns, starring alongside Wally Walls and Hoot Gibson.

Mix retired from acting, becoming a roping artist and trick rider for her father's circus and wild west show.

[12] The Rodeo Revue had a cast of 35, featuring comedian Jed Dooley and including Toby Tobias and his orchestra and an eight-woman ballet group in addition to Mix and her horse, Lindy.

[4] Mix and Harry Knight, a "champion Canadian bronco buster" eloped to Reno, Nevada, and were married on June 5, 1935.