Have you heard about the 2015 documentary "Unbranded"?
Wife and I streamed this award-winning film on Amazon Prime the other night, and a worthwhile watch it was. Four young Texans, all experienced riders and recently graduated from college, train and then ride mustangs from the Arizona/Mexico border all the way to the Canadian border to show how reliable and hardy these animals are. The film also explores the challenges of maintaining the wild horse herd -- which, surprising to me, actually is overpopulated and now has thousands of animals needing to be "adopted" and relocated -- and the Bureau of Land Management's approaches to balancing the needs of the horses and grazing of cattle.
Extraordinary scenery -- Arizona, Utah, Nevada, Wyoming, and Montana -- and a fascinating look at the horses and their riders, who predictably are, well, unpredictable. One of the best things I've watched in a long time, and my wife enjoyed it as well.
Here's the website for the film, and a link to the trailer.
Unbranded