Mountain Molly O' (1926)

"Molly Mallory put on a black wig, poses as a man and gets a job on Ted Riley's ranch. Ted catches some of his cowhand getting drunk one time too many and fires them. They jump on Ted but Molly, posing as a man, tosses a lasso on them and runs them off. The next morning, Kathleen and T. Edgerton go to town to pick up the ranch payroll. Edgerton, in order to restore himself to Kathleen's good graces, hires the three fired cowhands to hold them up so he can be a hero and run them away. But they double-cross him, take the money and kidnap Kathleen. But Molly rides to the rescue."