The sinkhole is named after a millhopper, a funnel-shaped container used in grist mills to feed grain into the stones.
The temperature at the bottom of the sinkhole is typically 10 degrees Fahrenheit cooler than at the rim.
Limestone layers exposed in the walls contain fossilized shark teeth and marine shells from the prehistoric era when Florida was submerged.
The sinkhole acts as a natural drainage basin for the surrounding area's groundwater.
The site was designated a National Natural Landmark in 1974.
Devil's Millhopper is a 120-foot-deep, 500-foot-wide limestone sinkhole located in Gainesville, Florida. It functions as a miniature rainforest ecosystem, characterized by a distinct microclimate that is significantly cooler and more humid than the surrounding terrain. Visitors descend a 232-step wooden staircase to reach the bottom of the sinkhole. Along the descent, the vegetation transitions from typical Florida pine woods to lush, fern-covered slopes and hardwood forests. Small waterfalls trickle down the limestone walls, draining into the basin below. The sinkhole was formed by the collapse of the underlying limestone bedrock, which is typical of Florida's karst topography. The park preserves this geological feature while serving as a site for ongoing scientific research. The limestone walls expose multiple layers of geological history, including fossilized marine life. A rim trail provides elevated views of the basin for those who prefer not to descend the stairs.
The viewing platform at the very top of the stairs, which captures the full scale of the sinkhole's opening.
Wear sturdy, closed-toe walking shoes, as the stairs can be steep and occasionally damp.
Bring insect repellent, as the humid, shaded environment at the bottom attracts mosquitoes.
Carry a water bottle, as there are limited facilities once you descend into the sinkhole basin.
Attempting the descent if you have mobility issues or heart conditions, as the climb back up consists of over 200 steep steps.
The park is generally closed on Tuesdays and Wednesdays.
Stay on marked trails at all times to prevent erosion and protect the sensitive sinkhole ecosystem; do not touch or remove fossils.
