Belize Barrier Reef: UNESCO's Seven Sites, Size and Danger-List Years
Verified on 14 November 2026 on the UNESCO World Heritage Centre’s pages for the Belize Barrier Reef Reserve System (its description, its maps page and two news items) and the About page of Belize’s Coastal Zone Management Authority and Institute.
The Belize Barrier Reef Reserve System was inscribed on UNESCO’s World Heritage List in 1996 under criteria (vii)(ix)(x). It is a serial property of seven protected areas covering 96,300 ha, and it was on the List of World Heritage in Danger from 2009 to 2018. UNESCO describes the system as including “the largest barrier reef in the northern hemisphere” but prints no length for it. The length Belize’s Coastal Zone Management Authority and Institute (CZMAI) gives is “over 280 km of barrier reef”.
The seven sites, as UNESCO lists them
| UNESCO ID | Component site | Property area (ha) |
|---|---|---|
| 764-001 | Bacalar Chico National Park and Marine Reserve | 10,700 |
| 764-002 | Blue Hole Natural Monument | 4,100 |
| 764-003 | Half Moon Caye Natural Monument | 3,900 |
| 764-004 | South Water Caye Marine Reserve | 29,800 |
| 764-005 | Glovers Reef Marine Reserve | 30,800 |
| 764-006 | Laughing Bird Caye National Park | 4,300 |
| 764-007 | Sapodilla Cayes Marine Reserve | 12,700 |
The seven areas add up to UNESCO’s printed total for the property (our sum). UNESCO’s maps page shows a dash in the buffer-zone column for every one of them, and its description spells the fifth Glover’s Reef Marine Reserve.
The World Heritage site is therefore a set of separate protected areas along the reef, not the whole reef: UNESCO says the seven “comprise 12% of the entire Reef Complex”. Hol Chan Marine Reserve, the subject of our Hol Chan and Shark Ray Alley page, is not one of the seven names on UNESCO’s list. Two of the seven, the Blue Hole and Half Moon Caye natural monuments, are covered with their park fees on our Great Blue Hole page. South Water Caye Marine Reserve is on our Hopkins page, which prints the Belize Fisheries Department’s area for it; the Fisheries Department and UNESCO print different areas for the reserve.
How big is it? Who says what
| Claim, as printed | Who says it |
|---|---|
| “the largest barrier reef in the northern hemisphere” | UNESCO, brief description |
| “the longest barrier reef in the Northern and Western Hemispheres” | UNESCO, criterion (vii) |
| “The largest reef complex in the Atlantic-Caribbean region it represents the second largest reef system in the world.” | UNESCO, description |
| “over 280 km of barrier reef” | CZMAI, About page |
| “the planet’s second longest unbroken reef system” | CZMAI, About page |
| 96,300 ha, the seven inscribed sites | UNESCO |
UNESCO says the reef complex “is comprised of approximately 450 sand and mangrove cayes”; CZMAI’s About page says Belize’s coastal zone contains “over 300 cayes”. Neither page explains the other’s figure. UNESCO adds that “Outside of the reef complex the property contains three atolls; Turneffe Island, Lighthouse Reef and Glover’s Reef”, and that Charles Darwin referred to it as the most remarkable reef in the West Indies. CZMAI says snorkelling and diving “draw around 900,000 tourists to the region annually”.
Why UNESCO inscribed it: the three criteria
- Criterion (vii): UNESCO calls the system “unique in the world for its array of reef types contained in a relatively small area”, including features “such as the Blue Hole and Rocky Point where the barrier reef touches the shore”.
- Criterion (ix): fringing, barrier and atoll reef types, with “an intact ecosystem gradient ranging from the terrestrial to the deep ocean”.
- Criterion (x): top predators on land, sea and in the air, namely “the jaguars of Bacalar Chico, the great hammerheads of the Blue Hole, and the ospreys of Glovers Reef”. Under this criterion UNESCO records 178 terrestrial plants, 246 taxa of marine flora, over 500 species of fish, 65 scleractinian corals, 45 hydroids and 350 molluscs. Earlier on the same page it gives “Approximately 247 taxa of marine flora”, so UNESCO’s page prints two figures for marine flora.
UNESCO names the threatened species the property shelters: the West Indian manatee (Trichechus manatus), the green turtle (Chelonia mydas), the hawksbill turtle (Eretmochelys imbricata), the loggerhead turtle (Caretta caretta) and the American crocodile (Crocodylus acutus). It names three bird colonies: the red-footed booby on Half-Moon Caye, the brown booby on Man O’War Caye and the common noddy on Glover’s Reef. The jaguar’s status is on our jaguars in Belize page.
On and off the List of World Heritage in Danger
| Date | What UNESCO recorded |
|---|---|
| 1996 | Inscribed on the World Heritage List |
| 27 June 2009 | The World Heritage Committee, meeting in Seville, decided to inscribe the property on the List of World Heritage in Danger |
| 26 June 2018 | The Committee, meeting in Manama, decided to remove it from the Danger List |
UNESCO’s 2009 item says “The main problem with Belize Barrier Reef Reserve System concerns mangrove cutting and excessive development in the property”, and that the Committee asked for the moratorium on mangrove cutting, which had expired in 2008, to be reinstated. Its 2018 item says the site had been listed in 2009 “due to the destruction of mangroves and marine ecosystems, offshore oil extraction, and the development of non-sustainable building projects”. It credits the removal to measures including “a moratorium on oil exploration in the entire maritime zone of Belize and the strengthening of forestry regulations allowing for better protection of mangroves”.
Who protects it
UNESCO says the component sites “have been gazetted as protected areas with legal protection measures provided under the national constitution, the Fisheries Act and the National Parks Act”, and that the government has set up “co-management agreements with various non-governmental organizations” to run them. It says that besides entrance fees, financial support for Belize’s protected areas can come through the national Protected Areas Conservation Trust. It lists the threats as overharvesting of marine resources, coastal development, tourism, industrial development and proposed oil and gas exploration and exploitation.
What UNESCO and CZMAI don’t publish
- A depth for the reef. Neither UNESCO’s description and maps pages nor CZMAI’s About page, read on 14 November 2026, gives one.
- A length from UNESCO. UNESCO calls it the largest barrier reef in the northern hemisphere and the longest in the Northern and Western Hemispheres, but its pages give no kilometre figure; the 280 km is CZMAI’s.
- Entrance fees. UNESCO mentions entrance fees as a source of funding but lists none.
How we researched this
On 14 November 2026 we read UNESCO’s description page for property 764 (the inscription year, criteria, area, Danger-List years and description), its maps page (the seven component sites and their areas), and its news items dated 27 June 2009 and 26 June 2018. We read CZMAI’s About page for its reef length, caye count and visitor figure. The check that UNESCO’s seven component areas add up to its 96,300 ha property total is ours.
Sources
- UNESCO World Heritage Centre: Belize Barrier Reef Reserve System: the 1996 inscription, criteria (vii)(ix)(x), 96,300 ha, the 2009-2018 Danger-List years, the seven sites named, 12% of the reef complex, about 450 cayes, the three atolls, the species counts and bird colonies, the legal protection, co-management, funding and threats.
- UNESCO World Heritage Centre: Belize Barrier Reef Reserve System, Maps: the seven component IDs, names and areas, and the empty buffer-zone column.
- UNESCO World Heritage Centre: Belize Barrier Reef Reserve System removed from the List of World Heritage in Danger, dated 26 June 2018: the Manama decision, the reasons for the 2009 listing and the 2018 removal.
- UNESCO World Heritage Centre: Belize Barrier Reef Reserve System and Colombia’s Los Katios National Park enter UNESCO’s Danger List, dated 27 June 2009: the Seville decision, mangrove cutting and excessive development, the moratorium that expired in 2008.
- Coastal Zone Management Authority and Institute: About CZMAI: “over 280 km of barrier reef”, the second longest unbroken reef system, over 300 cayes, around 900,000 tourists a year.
Last verified: 2026-11-14
Researched and written by Estuardo Enriquez for belizetravelblog.com, an independent site with no connection to any airport, airline, tour operator or government body.