Tom Mix was acknowledged as the "King Of Cowboys" Mix was in 291 films most were silent movies. He was the first western megastar. When a football injury sidelined Marion Morrison (later known as John Wayne) Mix helped him get work moving props on the back lot at Fox Studios. That was the beginning of Wayne's career.
In 1940 Mix was visiting a Sheriff in Tucson Arizona. When he left heading to Phoenix Mix was in a car crash that took his life he was 60 years old.

My brother just went on a bike trip from Montana to Illinois down to Tucson up to Vegas and met my other brother in Colorado then back to Montana.
While he was leaving Tucson he got this picture of the wreck site of Tom Mix.