The Blue Hole in the National Key Deer Refuge
Located on Big Pine Key, the Blue Hole offers a short trail and observation deck where you can immerse yourself in nature.
The Blue Hole is a large sinkhole. The sinkhole became a quarry and the limestone was used to construct roads in The Keys as well as Henry Flagler’s Oversea Railroad. After being included in the National Key Deer Refuge, the Blue Hole was replanted with native vegetation and returned to nature.
The water in the blue hole is a freshwater lens. This means that freshwater from rainwater floats on top of the saltwater that lies underneath. The Blue Hole provides a unique ecosystem for the wild plants and wildlife that thrive there.
The Blue Hole is included in the Florida Keys Birding and Wildlife Trail. Look for Key Deer, fish, alligators, turtles, iguanas, and a variety of birds (including wading birds), and snakes.
Sea level rise is an immediate threat to the Blue Hole. Lying only 3 to 6 feet above sea level, freshwater in wetlands in the Keys will become brackish or saltwater habitats if the sea level continues to rise. Mud turtles, marsh rabbits, and endangered Key Deer will be impacted by the loss of freshwater. When we make choices that protect our planet from climate change, we ultimately are protecting Florida and all of its inhabitants.
Photo credit: Dan Kon, Christian Kon
