Although geologists can’t say for certain, the Devil’s Millhopper sinkhole probably started forming ten to fifteen thousand years ago.

Here are the historical and informational descriptions from some placards around the park:

Devil’s Millhopper Name

During the last century, the grist mill was a familiar place to most rural families. Grain was fed into the mill from a funnel-shaped container called a “hopper.” The early homesteaders of this region found this sink to resemble a large millhopper which could feed grain into the Devil’s Mill at the center of the earth. Thus the name – “Devil’s Millhopper.”