In the middle 1800s, it is believed, the cave was the home of Farmington's mystery man, Will Warren. He was a poor farmhand with no property of his own. He refused to attend the village church on Sundays and spent his free time with the few Native Americans who still lived on the outskirts of town, fishing hunting and trapping.
At that time, many Farmington farmers raised sheep and made money selling the wool and meat. One day, Will stole some sheep. Their owners were furious and announced that they would have Will whipped at the public whipping post on Main Street. Will, just as angry, set a village house and barn on fire, then ran out of town and up through pastures and orchards to the summit of Rattlesnake Mountain. Farmers ran after him, their hounds sniffing at his trail. Exhausted, Will reached the top and found two Native American women who helped him into this cave. They brushed away his footprints and sat outside to hid the entrance. Will's hunters ran right on by the cave without seeing it, and Will was safe.