Crystal-clear water, coral reefs, and a national park just 45 minutes from Cartagena. Everything you need to know to have the perfect island day.
Forty-five minutes from the piers of Cartagena, the Caribbean changes. The water goes from murky to clear. The city sounds disappear. And suddenly you're in a national park of 27 coral islands — the Rosario Archipelago — where the fish are bigger than your hand and the silence is absolute.
The Rosario Islands are the most popular day trip from Cartagena, and for good reason. But how you do it makes all the difference.
Getting There: Your Options
Option 1: The Public Boat (Not Recommended)
The public lanchas leave from Muelle Turístico at 8am and return around 5pm. They're crowded (30+ people), loud, and land you at a busy dock on Isla Grande where vendors compete for your attention from the moment you arrive. Budget: around $30 per person round trip.
Option 2: Private Catamaran or Speedboat (Recommended)
Charter your own vessel — a catamaran for groups of 8–20, a speedboat for smaller groups. You set the schedule, choose your anchoring spots, and bring your own music, food and drinks. No strangers. No fixed itinerary. Cost: $500–$900 for a full day, split across the group.
What to Do at the Islands
- Snorkeling at the coral reefs (gear rental available at the island or bring your own)
- Swimming in the crystal-clear lagoons near Barú
- Visiting the Oceanario — Colombia's only open-water marine aquarium (unique experience)
- Kayaking around the mangroves
- Eating fresh lobster and ceviche at one of the stilted restaurant-bars
- Hammock-hanging in the Caribbean shallows
The Best Spots in the Archipelago
Playa Blanca (Barú Island)
Technically not part of the Rosario Islands but often visited on the same trip. The clearest and most beautiful beach near Cartagena. Very crowded on weekends — go on a weekday or go early.
Isla Grande
The largest island in the archipelago, with a village, restaurants, and coral reefs accessible from shore. More developed but also more facilities.
Isla del Rosario
The most exclusive island with luxury private villas. You can't stay unless you're a guest, but the waters around it are perfect for anchoring and snorkeling.
What to Bring
- Reef-safe sunscreen (SPF 50+ — the sun here is intense)
- Rash guard or long-sleeve UV shirt
- Cash in pesos for food and vendors at the islands
- Underwater camera or waterproof phone case
- Motion sickness medication if you're prone (the channel can be choppy)
- A bag for wet things on the way back
Best Time to Go
December through March is peak season — calm seas, clear visibility, and perfect weather. April–May has good conditions with fewer crowds. June through October is the green season: more rain, slightly choppier water, but far lower prices. We can advise on conditions before you book.
The difference between a great island day and a mediocre one is almost entirely about who organizes it. Private boat, the right anchoring spots, good food on board — that's the Mulata way.← Back to all guides