Some of the locals in Teton have affectionately given this name to Eloisa McKinnon. According to the legend, around 1890 Eloisa's parents arranged for her to be married to Tom Nelson. Tom was an old and strange man, but he was a rich farmer and her parents were poor and needed a rich in-law to help them out of their financial situation.

She begged her parents to call off the wedding, but they refused. Later, as she was being fitted for her wedding dress, she realized that she would rather die than marry Tom, so, wedding gown and all, Eloisa ran off into the night. She ran until she reached the newly constructed town flourmill, where she entered, climbed to the third floor and leapt through an open window to her death in the water below.

The townsfolk of Teton believe her ghost haunts that very place even today. Many people who now work there, or have been in the mill, have seen her ghost wandering the mill in despair. Her spirit was damned to repeatedly leap to her death throughout the fall season, still wearing her white wedding gown.

So for all those who dare come to experience The Haunted Mill, be aware that you too may see this Lady in White.