John Pennekamp made Key Largo's reef a state park
John Pennekamp Coral Reef State Park was dedicated on December 10, 1960. It became the country’s first undersea park and put the reef itself on the public park map.
The protected area starts at Key Largo and reaches about 70 nautical square miles into the Atlantic. Coral, fish, seagrass, mangroves, and water form one living system rather than scenery beyond the beach.
A glass-bottom boat lets some visitors see the reef while staying dry. Snorkel and dive trips offer a closer look when the water, weather, and each person’s skill fit the outing. Shore areas and exhibits also give families a way to learn about the park without taking an offshore tour.
The park is large, but access is never one-size-fits-all. Wind and low visibility may change a boat trip even when the land side is open. Construction or a park alert may affect a ramp, beach, or building without closing everything.
Check the live park page and tour schedule before leaving. Choose the activity that fits the day’s water and the group, then follow the current reef and wildlife rules.
Where to see it
John Pennekamp Coral Reef State Park in Key Largo. Check Florida State Parks for boat tours, snorkeling, diving, weather, water conditions, and park alerts.
Place paths
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Directly covered
Official sources
- Florida State Parks - John Pennekamp Coral Reef State Park
- Florida State Parks - John Pennekamp History
Last checked against these sources: July 31, 2026.
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