Ba Trai Dao beach in Lan Ha Bay, also known as Three Peaches Island, is one of the most rewarding stops for anyone chasing hidden beaches in Cat Ba, a cluster of three tiny islands that form a natural, wind-sheltered swimming pool you can only reach by boat.
What makes Ba Trai Dao different
Unlike the Cat Co beaches near Cat Ba town, Ba Trai Dao has no roads, no beach bars, and no crowds, just three small limestone islands enclosing a pocket of clear, calm water. The name translates to "three peaches," a nod to the shape of the islets when viewed from the water.
Water clarity here is good enough to spot coral reefs just below the surface, though visibility shifts with the tide, so timing your visit around a boat tour's scheduled stop usually gives you the best conditions rather than trying to plan around tides yourself.
Van Boi Beach a second off the beaten track option
Nearby, Van Boi Beach sits at the base of a dramatic limestone rock formation and is a popular launch point for kayaking to secluded beaches Cat Ba tours often build their itinerary around. Both spots share the same appeal, an untouched, rustic charm that's largely disappeared from the more accessible mainland beaches. For more on both spots and other hidden coves, see our guide to Cat Ba's best beaches.
How to actually reach Ba Trai Dao
There's no independent way to reach Ba Trai Dao by yourself, no road, no regular ferry, since it sits well out into Lan Ha Bay. The only realistic way in is aboard a Lan Ha Bay boat tour, most of which build in a scheduled swim and jump stop here roughly mid-afternoon, after a morning of cruising and kayaking through the bay's hidden lagoons.
This is by design rather than an oversight, keeping the spot boat-access-only is exactly what's kept it from turning into another crowded beach strip.
Is private beach camping in Lan Ha Bay possible
Private beach camping Lan Ha Bay style, an overnight stay directly on a secluded island beach, isn't a standard offering at Ba Trai Dao itself, since most cruises pass through as a day stop rather than an overnight anchor point. Travelers wanting an overnight experience closer to nature generally do better booking a multi-day Lan Ha Bay cruise with an overnight cabin, or an eco-homestay near Viet Hai village on the mainland side of the bay.
If a true isolated camping night is the goal, ask your tour operator directly about current options, since availability shifts by season and by operator.
What to bring for a day at Ba Trai Dao
Pack reef-safe sunscreen, a rash guard or swimsuit you can move in, and water shoes if you're prone to sensitive feet on rocky shallows. A waterproof phone pouch is worth having too, since a boat-only stop with no facilities means no easy way to dry off or charge anything until you're back on board.
A dry change of clothes left on board is worth packing as well, since the boat ride onward after your swim stop can feel chilly in a wet swimsuit, particularly outside the warmest summer months. A small dry bag for your camera or phone is also worth having, since spray and splashes are common even on a calm crossing out to the islands. Sun exposure is easy to underestimate out on open water too, so reapply sunscreen after any swim rather than assuming a single morning application will last through an entire afternoon on the boat.
Bring your own snorkeling mask if you have one, since gear rental options on board vary by operator and having your own guarantees a good fit.
Other secluded coves worth combining with your visit
Ba Trai Dao and Van Boi aren't the only off the beaten track Lan Ha Bay stops worth chasing. Several smaller, unnamed lagoons tucked behind the bay's limestone archways offer similar seclusion, though most don't appear on a standard map and are only known to local boat captains who route their tours through them on quieter days.
If your main cruise doesn't pass a spot you've read about online, it's worth asking your guide directly, since itineraries often flex around tide conditions and how many other boats are already anchored nearby that day. Smaller group tours and private charters generally have more flexibility to detour to these quieter corners than large shared boats.
Best time of year to visit Ba Trai Dao
Summer months from May to September bring the warmest water for swimming, though also the highest chance of a sudden afternoon squall rolling through, which can cut a swim stop short. The shoulder months of September through November tend to offer the best combination of clear water, comfortable air temperature, and calmer seas for the boat ride out.
Winter visits, December through February, are possible but the water runs noticeably cooler, so pack accordingly if a swim is non-negotiable for your trip.
Frequently asked questions
Is Ba Trai Dao suitable for non-swimmers
Yes. The sheltered, wind-protected pocket of water at Ba Trai Dao stays calmer than open sea, and life jackets are standard equipment on board, so non-swimmers can still enjoy wading and floating near the boat even without swimming out further.
How long do boats typically stop at Ba Trai Dao
Most day tours schedule around 30 to 45 minutes at this stop, enough time for a swim, a jump off the boat, and some photos, before continuing on to the next part of the itinerary.
Booking a tour that includes this stop
Our Lan Ha Bay day tour includes a swimming and jumping stop at this exact beach as part of its standard itinerary, alongside kayaking and a fish farm visit earlier in the day. For the full picture of what else the bay offers, see our Cat Ba Island Travel Guide, or start planning at Beka Travel.