Land O' Lizards(1916)

Eastern capitalists hire a stranger to head out to Arizona to investigate property near the Bar C Ranch, which contains gold. The Bar C is run by Buck Moran, and he and his cowboys are a lawless bunch. They don't know about the gold, but Dave Moore does, and so does his daughter Bobbie, whom he dresses up like a boy. Her true gender is eventually sussed out by the stranger.