Bai Tu Long National Park protects a rare land-and-sea mosaic in Quang Ninh, combining more than 80 islands and islets with marine waters, evergreen island forest, limestone karst, mangroves, coral reefs, seagrass, tidal habitats and enclosed 'tung–ang' ecosystems.
Overview
Understand the park as a protected ecological system, not simply a recreation area.
Bai Tu Long National Park is one of Vietnam's most important marine-island protected landscapes. Established on 1 June 2001 by Prime Minister's Decision No. 85/2001/QD-TTg through expansion and reclassification of the former Ba Mun Nature Reserve, the park covers 15,783 hectares in the principal official Quang Ninh and ASEAN Heritage Park sources: 6,125 hectares of emergent islands and 9,658 hectares of marine waters. More than 80 islands and islets form three main groups—Ba Mun, Tra Ngo and Sau—and include both terrigenous islands and limestone-karst islands. The park was declared an ASEAN Heritage Park on 30 September 2016. Its conservation importance comes from the direct connection between terrestrial forest and marine ecosystems: evergreen forest, limestone forest, mangroves, coral reefs, seagrass beds, tidal flats, caves and distinctive enclosed brackish 'tung–ang' systems. Quang Ninh reporting records more than 2,400 species and more than 100 species of conservation concern, but inventory totals have changed between surveys and should always be dated. Bai Tu Long should therefore be interpreted not as a quieter substitute for Ha Long Bay, but as a protected ecological system whose visitor access is secondary to biodiversity conservation.
Key things to understand
Read Bai Tu Long as a connected land-and-sea protected system rather than a collection of scenic islands.
Notice the contrast between terrigenous forested islands and limestone-karst islands.
Understand mangroves, seagrass and coral reefs as linked nursery, feeding and coastal-protection habitats.
Learn the park's distinctive 'tung–ang' ecology: enclosed karst depressions where marine and freshwater influences can create unusual brackish conditions.
Treat Ba Mun Island as a biodiversity stronghold rather than simply a hiking destination.
Observe Minh Chau's old Trâm Mốc forest as both ecological and cultural landscape.
Use only currently authorized boat routes, forest trails and cave access.
Do not anchor on coral, collect shells, corals, seagrass or living organisms.
Avoid approaching sea turtles, marine mammals or sensitive wildlife.
Check weather and marine conditions because wind, waves and visibility can change island access quickly.
Use legitimate local boat, guiding and community services.
Keep all tourism subordinate to national-park conservation rules.
Park perspective
How to understand this protected landscape
Why it matters
Bai Tu Long National Park is one of Vietnam's clearest examples of a protected area where terrestrial and marine conservation must be managed as one ecological system.
What makes it distinctive
More than 80 islands combine terrigenous forest, limestone karst and marine habitats, while the park's unusual tung–ang systems add a distinctive enclosed brackish-water ecology.
What visitors often miss
Visitors tend to focus on island scenery and overlook ecological connectivity: mangrove seeds disperse, coral larvae travel, turtles move between feeding areas and forested islands influence the quality of adjacent marine water.
It is a national park made of both islands and sea, where forest, mangroves, seagrass, coral and karst function together.
Protected landscape
Why this national park exists
Identity
Protected Area Role
A nationally protected marine-island landscape conserving both terrestrial and marine biodiversity.
Asean Role
An ASEAN Heritage Park recognized for ecological integrity, representativeness, naturalness, uniqueness and rare habitats.
Archipelago Role
Protects more than 80 islands and islets within the Bai Tu Long archipelago.
Marine Role
Nearly two-thirds of the park's official area is marine water.
Forest Role
Forested terrigenous and limestone islands provide terrestrial biodiversity refuges within a marine landscape.
Community Role
Fishing, aquaculture and island-community livelihoods form part of the wider social setting around the protected area.
Core Insight
Bai Tu Long's defining value is ecological connectivity between island forest, karst, mangrove, seagrass, coral and open marine water.
Designation
Established
2001-06-01
Legal Basis
Prime Minister's Decision No. 85/2001/QD-TTg
Origin
Created by expanding and reclassifying the former Ba Mun Nature Reserve.
Asean Heritage Park
Declared
2016-09-30
Network Role
Recognized as the 38th ASEAN Heritage Park at the time of designation according to Quang Ninh reporting.
Area
157.83 sq km
Meaning
ASEAN Heritage Parks are protected areas of high conservation importance representing the region's ecosystems.
Landscape
Landscape and geology shape how the park works
Geology
Terrigenous Islands
ASEAN material describes northern island terrain developed on sedimentary rocks including sandstone, conglomerate and arkose.
Limestone Islands
Southern island sections include limestone karst with caves and enclosed flooded depressions.
Karst Processes
Dissolution, weathering and marine erosion shape caves, notches, cliffs and enclosed karst basins.
Tectonic Context
Quang Ninh reporting describes the wider Bai Tu Long island landscape as the product of a geological history extending hundreds of millions of years.
Interpretive Value
The coexistence of terrigenous and limestone islands helps explain why forest, soil, caves and shoreline habitats vary so strongly across a small maritime area.
Visitor Rule
Do not damage cave formations, collect geological material or enter unmanaged karst systems.
Biodiversity
Official Inventory Context
Quang Ninh's 2024 reporting records 2,415 organisms: 1,195 forest plants and animals and 1,220 marine organisms.
Later Inventory
A December 2024 provincial article reports 2,421 species, illustrating continuing inventory updates.
2025 Context
A later provincial biodiversity article reports 2,416 organisms and 1,196 terrestrial forest organisms, again showing incremental survey changes.
Red List Context
Multiple Quang Ninh and ASEAN sources report 106 rare or threatened species in Vietnam Red Book and/or global Red List context.
Asean Context
The ASEAN Centre for Biodiversity describes Bai Tu Long as a biodiversity hotspot of Vietnam and reports 106 rare and endangered species.
Sensitive Species Rule
Do not publish precise nesting, denning, roosting, turtle-use or rare-plant locations.
Ecosystems
Connected habitats shape the protected landscape
01
Evergreen forest on terrigenous islands
Broadleaf evergreen forest on soil-bearing islands developed from non-limestone rock.
Why it matters
Supports terrestrial mammals, birds, reptiles, plants and watershed functions.
Visitor impact
Trail widening, fire, wildlife disturbance and plant collection can fragment island habitat.
02
Evergreen forest on limestone islands
Forest adapted to steep karst, exposed rock and shallow discontinuous soils.
Why it matters
Adds specialized terrestrial habitat and links to caves and enclosed karst systems.
Visitor impact
Recovery can be slow after trampling or vegetation damage.
03
Mangrove ecosystem
Salt-tolerant woody vegetation in tidal and brackish environments.
Why it matters
Nursery habitat, shoreline protection, sediment trapping and ecological connectivity.
Visitor impact
Boat wake, cutting, waste and trampling can damage roots and seedlings.
04
Coral reef ecosystem
Shallow marine habitat built by reef-forming corals and associated organisms.
Why it matters
Provides structural habitat and supports marine biodiversity.
Visitor impact
Anchoring, trampling, collecting and poor snorkeling/diving practice can cause direct damage.
05
Seagrass ecosystem
Submerged flowering-plant meadows in suitable shallow marine sediments.
Why it matters
Feeding and nursery habitat, carbon storage and sediment stabilization.
Visitor impact
Propeller scarring, anchoring and sediment disturbance can damage beds.
06
Intertidal ecosystem
Shoreline zones alternately exposed and submerged by tides.
Why it matters
Supports shellfish, worms, shorebirds, juvenile fish and nutrient exchange.
Visitor impact
Overharvesting and trampling can reduce ecological function.
07
Caves and enclosed lagoons
Karst caves, water-filled depressions and semi-enclosed marine-freshwater systems.
Why it matters
Provide unusual microhabitats and hydrological processes.
Visitor impact
Uncontrolled visitation, lighting, noise and waste can disturb sensitive environments.
Conditions & safety
Weather, terrain and preparation shape the visit
Conditions
Weather and terrain change the difficulty
Caves
Character
Karst corrosion and marine processes create caves, passages and enclosed water systems.
Cai De
Provincial material highlights the Cai De cave/luon system as an entrance toward enclosed mangrove habitat.
Rules
Enter only sites currently open to visitors.
Use authorized boats or guides where required.
Check tidal and weather conditions.
Carry independent lighting for managed cave walks when appropriate.
Do not touch formations unnecessarily.
Do not leave graffiti.
Do not disturb bats or other cave fauna.
Do not enter enclosed systems during unsafe water conditions.
Safety
Prepare for terrain, weather and changing conditions
Low Impact Practice
Carry all waste back to managed collection points.
Avoid single-use plastic on boat trips where practical.
Never throw food or waste into the sea.
Do not collect shells, coral, plants or wildlife.
Use authorized trails and landing sites.
Do not anchor independently in sensitive habitat.
Keep distance from wildlife.
Avoid loud music in natural areas.
Use refillable water containers where practical.
Respect temporary closures.
Do not light unauthorized fires on forested islands.
Keep sunscreen, fuel and chemicals out of marine water.
Conservation
Visitor access is subordinate to protection
Current conservation context
Core Priorities
Island forest protection
Marine biodiversity conservation
Coral reef protection
Mangrove conservation
Seagrass protection
Threatened-species recovery
Sustainable fisheries interface
Waste and water-quality control
Environmental education
Low-impact ecotourism
Pressures
Unsustainable fishing
Marine litter
Tourism disturbance
Anchor and propeller damage
Habitat fragmentation
Illegal wildlife or plant collection
Coastal development pressure
Water pollution
Climate-driven coral stress
Management Principle
Conservation of land and sea must be integrated because ecological processes cross island shorelines and formal boundaries.
Visitor Message
The park is not a free-access recreation area; access exists within a conservation mandate.
Research
Themes
Marine-terrestrial ecological connectivity
Tung–ang hydrology
Mangrove ecology
Coral recruitment
Seagrass dynamics
Sea-turtle ecology
Island biogeography
Karst ecology
Heritage-tree conservation
Marine litter
Tourism carrying capacity
Climate resilience
Why It Matters
Few Vietnamese national parks protect such a tightly connected mosaic of forested islands and marine ecosystems.
Wildlife & visit planning
Observe responsibly and choose a visit that fits
Wildlife
Observe without turning wildlife into a target
Photography
Subjects
Forested island chains
Limestone karst
Mangrove-fringed water
Old Trâm Mốc forest
Marine reflections
Cave entrances
Low-tide shoreline patterns
Fishing and island-community landscapes
Boat Tip
Use secure straps and weather protection for equipment.
Wildlife
Use long focal lengths and never crowd or disclose sensitive wildlife sites.
Drone
Do not assume permission; aviation, protected-area and security rules apply.
Ethics
Do not land on closed islands or enter conservation zones for a photograph.
Location
AreaBai Tu Long Bay / Van Don area, Quang Ninh, Vietnam
Van Don Ancient Commercial PortThe island region preserves archaeological and historical evidence of the trading port established under Vietnamese dynasties from the 12th century.
Ha Long Fishing-Community CultureBoat skills, fishing knowledge, worship and foodways reflect generations of human adaptation to Hạ Long and Bái Tử Long waters.
Van Don Sa SungSá sùng, a marine worm harvested from sandy tidal flats, is especially associated with Vân Đồn and northern Quảng Ninh cuisine.
Questions
Frequently asked questions
What is Bai Tu Long National Park?
It is a Vietnamese national park protecting forested islands, limestone karst and marine ecosystems in the Bai Tu Long archipelago of Quang Ninh.
When was Bai Tu Long National Park established?
It was established on 1 June 2001 under Prime Minister's Decision No. 85/2001/QD-TTg by expanding and reclassifying the former Ba Mun Nature Reserve.
How large is the park?
Principal official and ASEAN sources give 15,783 hectares: 6,125 hectares of islands and 9,658 hectares of marine water.
How many islands are in the park?
Quang Ninh sources describe more than 80 islands and islets grouped mainly into Ba Mun, Tra Ngo and Sau.
Is Bai Tu Long an ASEAN Heritage Park?
Yes. The ASEAN Centre for Biodiversity records declaration on 30 September 2016.
Is it a UNESCO World Heritage Site?
No. ASEAN Heritage Park status is different from UNESCO World Heritage inscription.
What ecosystems occur in the park?
Major ecosystems include evergreen island forest, limestone forest, mangroves, coral reefs, seagrass, intertidal habitat, caves and enclosed tung–ang systems.
What is a tung–ang ecosystem?
It is a distinctive enclosed or semi-enclosed karst water system where marine and freshwater influences can meet, creating unusual brackish ecological conditions.
How biodiverse is the park?
Recent Quang Ninh inventories report more than 2,400 organisms. The exact total varies by survey, and more than 100 species are reported in national/global conservation lists.
Why do species totals differ between official articles?
Inventories are updated over time. Provincial reporting has cited 2,415, 2,416 and 2,421 organisms in different recent datasets, so the survey date should always be retained.
What is special about Ba Mun Island?
Ba Mun is one of the park's principal island groups and a major forest-biodiversity stronghold with old trees and protected wildlife habitat.
What are the Heritage Trees in the park?
In 2024, 156 trees were recognized as Vietnam Heritage Trees: 150 Trâm Mốc on Minh Chau Island, three Trâm Vỏ Đỏ on Ba Mun and three Trai Lý on Mang Ha Nam.
Can visitors land on any island?
No. Landing and trail access depend on current national-park, conservation and marine-management rules.
Can visitors snorkel or dive?
Only in places and periods currently authorized and suitable. Coral and seagrass must not be touched, collected or damaged.
Can visitors see sea turtles?
Sea turtles occur in the wider ecological system, but sightings must never be guaranteed and sensitive locations should remain protected.
Can I fly a drone?
Do not assume permission. Protected-area, aviation and local security rules apply.
When is the best time to visit?
There is no single universally best period. Marine weather, wind, storms, visibility and route availability should guide timing.
What should visitors avoid most?
Unauthorized landings, wildlife disturbance, coral contact, anchoring in sensitive habitats, littering and ignoring weather or ranger instructions.
Sources
Primary references
ASEAN Centre for BiodiversityBai Tu Long National Park - ASEAN Heritage Parks