Located in the Hughes Mountain Natural Area is a trail called Devil’s Honeycomb Trail. It consists of glades, savanna, old fields and it is half forest. Polygonal columns of rhyolite make up what the locals call the Devil’s Honeycomb and is located at the highest point of the mountain. It is one of Missouri’s geologic wonders.
Around 1.5 billion years ago the rocks were liquefied by volcanoes associated with the St. Francois Mountains. The molten rock contracted, and as it cooled cracked and created multi-sided columns and created a rhyolite formation that locals named the Devil’s Honeycomb. The Precambrian rock outcrops are among the most ancient, exposed rocks in the United States.
The Hughes Mountain Natural Area is located off highway M, 3 miles southeast of Irondale.