It’s a 24-mile long gravel road that runs along the southern border of White Mountain HMA, beginning at Green River, WY. Refer to this page for directions. The area is marked by numerous Herd Areas (red borders), where wild horses were found in 1971 (when the WHB Act became law), but today have no AMLs and are not managed for horses. Were they zeroed out to make room for livestock grazing?
Pilot Butte, seen in the following video, was a landmark used by pioneers in their westward migration. Horses roaming the hills are remnants of that era.
Western Horse Watchers Association 