The Dolphin Research Center on Grassy Key is one of the most popular attractions in the Florida Keys — and for good reason. This nonprofit facility is home to a family of Atlantic bottlenose dolphins and California sea lions living in natural saltwater lagoons right on the Gulf of Mexico. Visitors come from around the world to watch narrated behavior sessions, participate in interactive swim programs, and learn about dolphin cognition, conservation, and care.
If you’re planning a visit, one of the most important decisions you’ll make is where to stay. The Dolphin Research Center is located at Mile Marker 59 on the Overseas Highway, in the Marathon area of the Middle Keys. And while there are plenty of accommodation options scattered across the Keys, staying nearby means less driving, more flexibility with your schedule, and the ability to combine your dolphin experience with everything else Marathon has to offer.
Blackfin Resort & Marina in Marathon is one of the best hotel options near the Dolphin Research Center — just a short drive down the Overseas Highway, with a private beach, swimming pool, full-service marina, on-site restaurant, and a location that puts you within easy reach of every top attraction in the Middle Keys.
Here’s everything you need to know about staying near the Dolphin Research Center and making the most of your visit.
About the Dolphin Research Center
The Dolphin Research Center (DRC) was founded in 1984 as a nonprofit education and research facility. The site has a fascinating history — it began as a dolphin training school in the late 1950s, and one of its original dolphins, Mitzi, starred in the original Flipper movie and its sequel. Today, it’s one of the most respected marine mammal facilities in the country, accredited by the Alliance of Marine Mammal Parks and Aquariums.
The center is home to more than two dozen dolphins and several California sea lions living in a 90,000-square-foot series of natural saltwater lagoons carved from the Gulf shoreline. Over half of the dolphins were born at the facility; the others arrived from partner facilities or were rescues deemed unreleasable by the government.
DRC’s research program focuses on dolphin cognition, behavior, and husbandry, and the facility has published groundbreaking studies on topics ranging from dolphin communication to cooperative behavior. But for visitors, the real magic is the chance to observe and interact with these incredible animals in a setting that prioritizes their welfare.
- Location: 58901 Overseas Hwy, Grassy Key, FL 33050 (MM 59)
- Hours: Open daily 9:00 AM – 4:30 PM (last admission 4:00 PM). Closed Memorial Day, Labor Day, Thanksgiving, and Christmas
- General Admission: Adults $36, children 4–12 $25, ages 3 and under free. Military discount available. Interactive programs priced separately
- Parking: Free on-site parking
- Pet-friendly: Yes — leashed pets are welcome on the grounds
- Website: org
What You Can Do at the Dolphin Research Center
A general admission ticket gives you all-day access to the facility, where you can watch narrated behavior sessions and educational presentations every 30 minutes throughout the day. You’ll learn about dolphin maternity, social groups, physiology, natural abilities, and the center’s ongoing research. Trainers are available to answer questions, and the atmosphere is relaxed and unhurried — many visitors who plan a one-hour stop end up staying for three.
For a more immersive experience, DRC offers several interactive programs at additional cost:
- Dolphin Encounter — The signature in-water swim program. Spend 20–25 minutes in the lagoon with a dolphin, including a dorsal pull ride and a kiss. The most popular program; reservations can be made up to 6 months in advance ($199–$225 per person)
- Family Dolphin Splash — A waist-deep water experience designed for families, where you interact with dolphins from a submerged platform. Great for younger kids and anyone who wants close contact without full swimming
- Meet the Dolphin — A from-the-dock encounter where you can greet and interact with a dolphin from a floating platform. Good option for small children or guests who prefer to stay dry ($70 per person, free for children 4 and under)
- Paint with a Dolphin — A dolphin creates an original artwork on canvas using a paintbrush, and you take it home as a one-of-a-kind souvenir
- Ultimate Trainer for a Day — A full-day program where guests shadow trainers and participate in dolphin care, feeding, and training sessions
- Researcher Experience — A half-day program where guests work alongside the DRC research team
- VIP Experience — A half-day behind-the-scenes tour with personalized interactions
Important: Interactive swim and encounter programs book up fast, especially during winter and spring peak season. Reserve your spot as far in advance as possible — the Dolphin Encounter program in particular can fill up months ahead.
[Image: Family interacting with dolphins from a dock platform. Alt text: “Family meeting a dolphin at the Dolphin Research Center on Grassy Key Florida Keys”]
Why Blackfin Resort & Marina Is the Best Place to Stay Near the Dolphin Research Center
Blackfin Resort & Marina is located at 4650 Overseas Highway in Marathon (MM 49.5), just about 10 miles south of the Dolphin Research Center. The drive takes approximately 12–15 minutes along the scenic Overseas Highway — close enough to get there easily for morning programs, but far enough into Marathon proper that you have access to all the town’s restaurants, attractions, and activities for the rest of your trip.
Here’s what makes Blackfin the ideal home base for a Dolphin Research Center visit:
Waterfront Location with a Private Beach
Blackfin sits on the Gulf side of Marathon with its own private beach, giving you sunset views, calm water access, and a relaxing spot to unwind after a day of dolphin encounters. Many hotels near the DRC are set back from the water — Blackfin puts you right on it.
Full-Service Marina
If you’re traveling with a boat or planning to rent one during your trip, Blackfin’s marina offers 27 slips for vessels up to 40 feet, a boat ramp for trailered boats, 30-amp electric, water, Wi-Fi, and pumpout service. The marina provides direct Gulf access to both Florida Bay and the Atlantic, making it easy to combine your DRC visit with fishing, snorkeling, or island-hopping adventures.
On-Site Restaurant: Hurricane Grille
After a morning at the Dolphin Research Center, come back to the resort and enjoy fresh seafood, tropical cocktails, and waterfront dining at the Hurricane Grille without ever leaving the property. It’s the kind of convenience that makes a vacation feel effortless.
Related: Hurricane Grille at Blackfin Resort: Your Waterfront Dining Guide
Pool, Dive Shop & More
Blackfin also features a swimming pool, on-site dive shop (Tilden’s Scuba Center), fish cleaning station, BBQ grills, laundry facilities, and a pet-friendly policy ($25/night pet fee) — which pairs nicely with the DRC’s pet-friendly grounds. You can bring the whole family, including the dog.
Central Marathon Location
Unlike some accommodations on Grassy Key itself (which can be isolated), staying in Marathon proper means you’re close to everything: Sombrero Beach, the Turtle Hospital, Florida Keys Aquarium Encounters, Crane Point Museum, dozens of great restaurants, and the full range of water sports and charter services. The Dolphin Research Center is a highlight of your trip, but it’s not the only thing — and Blackfin’s location lets you make the most of every day.
Planning Your Dolphin Research Center Visit from Blackfin Resort
Getting There
From Blackfin Resort, head northeast on the Overseas Highway (US-1 North). The Dolphin Research Center is at MM 59 on the right side (Gulf side) of the highway. Look for the giant dolphin statue out front — you can’t miss it. Free parking is available on-site. The drive is straightforward with no turns, and the scenery along the way is classic Florida Keys.
Best Time to Visit
Arrive when the doors open at 9:00 AM if possible. The first sessions of the day tend to be less crowded, and you’ll have the best chance of comfortable temperatures before the midday heat builds. If you’ve booked an interactive program, check your confirmation for your specific time slot — most programs run in the morning hours.
The DRC is busiest during winter and spring peak season (December through April). If you’re visiting during these months, book your interactive programs as far in advance as possible — the Dolphin Encounter swim program can sell out months ahead.
What to Bring
- Reef-safe sunscreen (you’ll be outdoors the entire visit)
- Hat and sunglasses
- Swimsuit and towel if you’ve booked an in-water program
- Waterproof camera or phone case (you’ll want photos)
- Cash for the gift shop and snack bar
- Comfortable walking shoes or sandals
How Long to Spend
Plan for at least 2–3 hours with general admission. Narrated sessions and educational presentations run every 30 minutes, and you’ll want time to explore the grounds, watch the dolphins during their free time, talk to trainers, and visit the gift shop. If you’ve booked an interactive program, plan for 3–4 hours total. Many families end up spending most of the morning here.
Sample Day Trip: Dolphin Research Center + Marathon
Here’s how a perfect day might look when you combine a DRC visit with everything Marathon has to offer:
8:00 AM: Breakfast at The Stuffed Pig in Marathon (arrive early — there’s often a line)
9:00 AM: Arrive at the Dolphin Research Center for opening. Watch the first behavior sessions, explore the grounds, and enjoy your interactive program if booked
12:00 PM: Head back toward Marathon. Lunch at Keys Fisheries (try the famous lobster Reuben) or Burdine’s Waterfront
1:30 PM: Afternoon at Sombrero Beach — swim, paddleboard, or just relax on the sand
4:00 PM: Head back to Blackfin Resort for pool time and a refresh before dinner
5:30 PM: Sunset from Blackfin’s private beach with a cocktail from the Hurricane Grille
6:30 PM: Dinner at the Hurricane Grille, or drive to one of Marathon’s waterfront restaurants for the evening
Other Top Attractions Near Blackfin Resort
One of the best things about staying at Blackfin Resort is how much more there is to do beyond the Dolphin Research Center. Marathon is packed with world-class attractions and activities:
- The Turtle Hospital — Another must-visit nonprofit, offering guided tours of a real sea turtle rehabilitation center (MM 48.5, just 1 mile from Blackfin)
- Florida Keys Aquarium Encounters — Interactive aquarium with touch tanks, shark encounters, and stingray feeding (MM 53)
- Sombrero Reef Snorkeling — One of the best coral reefs in the Keys, just four miles offshore with spectacular snorkeling
- Seven Mile Bridge — Walk, bike, or fish the historic Old Seven Mile Bridge and visit Pigeon Key
- Crane Point Museum & Nature Center — 63-acre nature preserve with trails, a wild bird center, and historic buildings
- Fishing Charters — World-class deep sea, reef, flats, and backcountry fishing available right from Blackfin’s marina
- Kayak Eco-Tours — Paddle through the Boot Key mangrove tunnels and spot manatees, sea turtles, and tropical birds
- Key West Day Trip — Key West is just an hour south for a full day of sightseeing, dining, and nightlife
Related: Family-Friendly Things to Do in Marathon, FL: The Ultimate Guide for Kids of All Ages
Tips for Visiting the Dolphin Research Center
- Book interactive programs early. The Dolphin Encounter swim program can sell out months in advance during peak season. Reserve online at dolphins.org as soon as you know your travel dates
- General admission alone is worth the trip. Even without an interactive program, you’ll see dolphins and sea lions up close, watch training sessions, and learn from expert staff. Many visitors rate it as a trip highlight with just general admission
- Plan for the weather. The facility is entirely outdoors. Bring sunscreen, a hat, sunglasses, and water. On hot days, the shaded areas and lagoon breezes help, but mornings are more comfortable
- Kids under 5 can’t swim with dolphins. Children must be at least 5 years old for in-water programs. The Meet the Dolphin dock encounter is open to all ages (children under 5 are free with a participating adult)
- Dolphins choose to participate. DRC prioritizes animal welfare, so program availability may vary depending on the dolphins’ needs and choices on any given day. This is a feature, not a bug — it’s part of what makes this facility special
- The gift shop is excellent. Unique dolphin-themed merchandise, including original dolphin-painted tote bags and artwork. Great spot for a souvenir that supports the center’s nonprofit mission
- Military discount available. Active military and veterans receive $16 off general admission with valid ID
- You can “adopt” a dolphin. DRC offers symbolic dolphin and sea lion adoptions, which make great gifts and support the center’s care and research programs
Best Time of Year to Visit
The Dolphin Research Center is open year-round, so there’s no bad time to visit. That said, here’s how the seasons affect your experience:
- Winter (December–February): Peak season for the Florida Keys. Beautiful weather, but the most crowded. Book programs and your hotel well in advance
- Spring (March–May): Arguably the best time — warm and sunny with slightly fewer crowds than winter. Water temperatures are ideal for swim programs
- Summer (June–August): Hot and humid with afternoon thunderstorms, but fewer tourists and easier booking. Arrive early to beat the heat
- Fall (September–November): Fewest crowds and lowest prices, though hurricane season runs through November. Great for a quieter, more intimate experience
Related: Florida Keys in Spring: Why March–May Is the Best Time to Visit
Book Your Stay Near the Dolphin Research Center
A visit to the Dolphin Research Center is one of those experiences that stays with you — the intelligence of the dolphins, the passion of the trainers, and the beauty of the Gulf setting create a memory that lasts well beyond the trip. And when you pair that experience with a stay at Blackfin Resort & Marina, you get the full Florida Keys package: waterfront accommodations, a private beach, marina access, on-site dining, and a location that puts you within easy reach of everything the Middle Keys have to offer.
Whether you’re planning a romantic getaway, a family adventure, or a trip centered around the incredible marine life of the Florida Keys, Blackfin Resort is the perfect place to call home.
Ready to plan your Florida Keys dolphin adventure? Book your stay at Blackfin Resort & Marina today.
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