Bette Zirkelbach, general manager of The Turtle Hospital, marked the moment by noting that everyone on this planet is connected, and that the timing, on Earth Day, felt right.
That was the scene on April 22, 2026, when more than 200 people gathered on the sand at Sombrero Beach to watch a green sea turtle named Nutella swim back into the Atlantic. She had arrived at The Turtle Hospital four months earlier weighing 15 pounds, tangled in something that had damaged her flipper and left her carrying a load of tumors. She left weighing 20 pounds, after honey and laser therapy on the flipper and surgery to remove the growths. If you live in Marathon and happened to be at the beach that morning, you didn't need a ticket or an appointment to watch it happen. You just needed to be there.
Most people who move to this stretch of Key Vaca assume the turtle action peaks in summer, when loggerheads haul themselves onto the sand at night to lay eggs. Sombrero Beach is in fact one of Florida's designated nesting zones, active from April through October. But that's not when the beach turns into a release stage, and it's not when The Turtle Hospital's tanks fill up. That happens in winter, and the reason has less to do with Marathon's weather than with what's happening in the water off New England.
The Ambulance Isn't Answering an Accident
The Turtle Hospital sits at mile marker 48.5 on Overseas Highway, in a building that used to be the Hidden Harbor Motel. Richie Moretti bought the property in 1981 and started using its saltwater pool to nurse injured fish and turtles. The state required a rehabilitation permit to keep sea turtles at all, since they're endangered, and Moretti got one in 1986. A former strip club next door became the main hospital building in 1991. The motel stopped renting rooms in 2005, and what had been a roadside stopover is now a full veterinary operation with a staff of 18, three dedicated ambulances, a 100,000-gallon tide pool, and 23 smaller tanks.
The hospital treats around 100 turtles a year and has rehabilitated and released more than 1,500 since it started, not counting hatchlings. Roughly 40,000 people take the paid tour annually, at $30 for an adult ticket, and that revenue is what keeps the nonprofit running. But the tour and the release are two different things. The tour happens on the hospital's schedule. The release happens on the turtle's schedule, and increasingly, on New England's.
Sombrero Beach Moonlights as a Release Stage
When a patient is ready to go home, the hospital doesn't quietly slip it back into the water somewhere private. It drives the turtle in one of its ambulances to Sombrero Beach and invites the public to watch. Wow, a juvenile green turtle found off Marathon the previous August tangled in fishing line and carrying a heavy fibropapilloma tumor load, went back to sea from Sombrero on January 31, 2025, at 9:30 in the morning. Pride, found in early June 2025 with the same kind of entanglement and tumors, went back on September 10, 2025, with the ambulance arriving at 6:15 in the evening and the release fifteen minutes later.
The beach's role in turtle science goes beyond the hospital's own patients. On July 10, 2026, the Sea Turtle Conservancy used Sombrero Beach for a Tour de Turtles release, sending a rehabilitated turtle back into the Atlantic wearing a satellite transmitter that lets researchers track its movements afterward. That event, like the hospital's releases, was free and open to anyone who wanted to walk down and watch, no registration required.
If you've lived in Marathon long enough to think of Sombrero as your neighborhood beach, the picnic pavilions and volleyball nets and swim area, it's worth knowing that the same sand periodically becomes the exit point for some of the most closely monitored wildlife recoveries in the Keys.
The Turtles Arrive on New England's Calendar
Here's the part that surprises people who assume turtle season means summer. The busiest stretch for The Turtle Hospital isn't nesting season at all. It's winter, when water temperatures off New England drop below 55 degrees and start shutting turtles' bodies down. Cold-stunning works on turtles the way hypothermia works on people. Their metabolism slows, they can't dive or swim properly, and some develop pneumonia on top of it. Volunteers up north scoop up the stranded animals and fly them to warmer water, and a lot of them land in Marathon.
On December 10, 2025, 25 critically endangered Kemp's ridley turtles arrived at The Turtle Hospital straight from New England waters, all suffering cold-stun symptoms. Kemp's ridleys are the most endangered sea turtle species in the world, which is part of why hospital staff treat each cold-stun season as a conservation event and not just an intake surge. One of the patients that January was a Kemp's ridley named Didgeridoo, part of the same wave of New England arrivals recovering at the hospital that winter.
This isn't a one-winter pattern. It's a recurring feature of how the hospital's calendar actually works, and it means the months when Marathon residents are least likely to think about sea turtles, December through February, are exactly when the hospital's ambulances are busiest and the odds of a Sombrero Beach release climb.
Some Winters, the Keys' Own Water Gets Cold Enough
New England isn't the only source. On February 5, 2026, eight young green turtles were brought to The Turtle Hospital after suffering cold-stunning in the upper Florida Keys itself, where water temperatures had dropped to 50 degrees. That's a detail worth sitting with if you've always pictured cold-stunning as something that happens somewhere else and gets shipped to Marathon for treatment. Some winters, the water right off the Keys turns cold enough on its own to hurt turtles that never left home.
Once stabilized, these patients follow the same track as the ones flown in from up north: recovery in the tanks, treatment for whatever came with the cold stun, and eventually a ride to Sombrero Beach in the ambulance.
Names Before Notices
Every patient the hospital releases publicly has a name and a case file that the public gets to hear before the turtle goes back in the water. A few from the last two years:
- Wow, a juvenile green turtle rescued off Marathon in August 2024, entangled in fishing line with fibropapilloma tumors, released at Sombrero Beach on January 31, 2025.
- Pride, a juvenile green turtle found in early June 2025, also entangled and carrying tumors, released at Sombrero Beach on September 10, 2025.
- Nutella, treated for a flipper injury and tumors with honey therapy, laser treatment, and surgery, released on Earth Day 2026 in front of a crowd of more than 200.
None of these were nesting-season stories. They span January, September, and April, which tracks with how the hospital's population actually moves: patients come in heaviest during winter cold-stun events and get released as they recover, on whatever month that recovery lands.
What to Watch For This Winter
If the last two cold-stun seasons are any indication, the months ahead will bring another wave of New England arrivals to mile marker 48.5, and possibly another batch of locally cold-stunned turtles if Keys waters dip the way they did in early February 2026. Somewhere in the following months, some of those turtles will be well enough to go home, and when that happens, the hospital brings the ambulance to Sombrero Beach and lets anyone who's there watch.
You don't need to plan a trip around it. You just need to know that if you see the ambulance parked at Sombrero some ordinary weekday morning, it's not an accident scene. It's a turtle going home, and it's free to watch.
If you're settling into Marathon and want to know what else runs on a schedule most newcomers never hear about, from turtle releases to the tide of small local rituals that make this town what it is, Barefoot in the Keys keeps track of the details that don't show up in a listing description. Reach out any time you want to talk about what living here actually looks like, season by season.
