In a race against the weather last fall, they left behind the horse they named Valentine to get the rest of the animals down. When they went back for her the next day, she had vanished into the vast Wyoming wilderness. Six weeks later, a worker spotted the 6-year-old mare, and her owners helped guide the healthy horse out through a storm and deep December snow. He said perhaps the horse left the trail to get water. The Wyoming Board of Livestock is leading the investigation into what happened, including the reason the wranglers left her.

Source: Fox News January 26, 2017 18:16 UTC