The Bacalar Chico National Park and Marine Reserve is a protected area located at the northern tip of Ambergris Caye in Belize. It encompasses a significant portion of the island's northern section as well as extensive marine habitats, including portions of the Belize Barrier Reef, a UNESCO World Heritage Site. The reserve was officially established in 1996 and covers an area of approximately 110 square kilometers, integrating both terrestrial and marine ecosystems into a single management unit.

The park holds considerable archaeological and historical importance. It contains several ancient Maya sites, evidence of settlements that date back over two millennia. Furthermore, the area is historically recognized as the location where Bacalar Chico, a narrow channel separating Ambergris Caye from Mexico, was artificially cut by the Maya centuries ago, effectively creating an island. This channel now serves as a national border between Belize and Mexico.

Ecologically, the reserve is a vital sanctuary for biodiversity. Its terrestrial zones consist of mangrove forests, littoral forests, and sandy beach ridges, which provide critical nesting grounds for endangered sea turtles, including the hawksbill and loggerhead species. The marine environment features seagrass beds, coral reefs, and shallow lagoons that support a rich array of marine life, such as manatees, dolphins, numerous fish species, and invertebrates.

As a premier marine protected area, Bacalar Chico is a notable destination for diving and snorkeling. The reef walls, canyons, and coral formations within its boundaries offer exceptional underwater visibility and opportunities to observe vibrant coral communities and pelagic fish. The site is managed with a focus on conservation, and visitor access is regulated to minimize environmental impact, often requiring a licensed tour guide for entry.

The management of the park involves a multi-stakeholder approach, including government agencies and non-governmental organizations, with objectives centered on conservation, sustainable tourism, and scientific research. Ongoing monitoring programs track the health of coral reefs, sea turtle populations, and other key indicators to inform adaptive management strategies for this ecologically sensitive region.