Mountain gorillas live in just two isolated pockets of forest in central-east Africa, split across three countries: the Democratic Republic of Congo, Rwanda, and Uganda. Their entire world population, roughly 1,063 individuals at last count, occupies four national parks in these countries. No mountain gorillas live in captivity anywhere on Earth.
The Two Populations
The global mountain gorilla population is divided into two distinct groups separated by about 25 miles of farmland and human settlement. Scientists have debated whether these two groups may actually represent separate subspecies, given how long they’ve been isolated from each other.
The larger group lives in the Virunga Mountains, a chain of extinct volcanoes straddling the borders of the Democratic Republic of Congo, Rwanda, and Uganda. A 2018 census counted a minimum of 604 gorillas here. The Virunga population is spread across three adjoining national parks: Virunga National Park in the DRC, Volcanoes National Park in Rwanda, and Mgahinga Gorilla National Park in Uganda. The gorillas move freely across these international borders, following food sources through dense montane forest.
The second population lives entirely within Bwindi Impenetrable National Park in southwestern Uganda. A census the same year counted at least 459 individuals in 36 social groups, plus 16 solitary males. Bwindi’s gorillas inhabit a different type of forest than their Virunga relatives, at slightly lower elevations and in denser, older-growth vegetation. Together, these two populations make mountain gorillas the only wild great ape whose numbers are confirmed to be increasing.
What the Habitat Looks Like
Mountain gorillas live at high elevations on forested volcanic slopes, typically between about 2,200 and 4,300 meters (7,200 to 14,100 feet). At these altitudes, the climate is cool, misty, and wet. Temperatures can drop near freezing at night, which is one reason mountain gorillas have noticeably longer, thicker fur than their lowland cousins. That dense coat insulates them in conditions no other gorilla subspecies regularly faces.
The Virunga volcanoes are blanketed in bands of vegetation that change with altitude: bamboo forest at lower elevations, transitioning to hagenia and hypericum woodland, then alpine meadows near the summits. The gorillas move between these zones seasonally, spending more time in bamboo stands when fresh shoots are available. Bwindi’s forest is older and more botanically diverse, a tangle of trees, vines, and undergrowth so dense it earned the “impenetrable” label. Both habitats sit surrounded by some of the most densely populated agricultural land in Africa, with communities relying primarily on subsistence farming right up to the park boundaries.
How Mountain Gorillas Differ From Other Gorillas
Mountain gorillas are one of two subspecies of eastern gorilla (the other being Grauer’s gorilla, sometimes called the eastern lowland gorilla). Eastern gorillas as a species are the largest living primates, with longer faces and broader chests than their western relatives. Mountain gorillas specifically stand out for their thick, shaggy hair, an adaptation to cold high-altitude nights that no other gorilla needs.
Every gorilla you’ve seen in a zoo is almost certainly a western lowland gorilla, recognizable by their slightly smaller build and reddish-brown hair on top of the head. Mountain gorillas have never been successfully kept in captivity, which means the only way to see one is to travel to one of those four parks in central-east Africa.
A Conservation Recovery Story
The current population of over 1,000 mountain gorillas represents a dramatic rebound. In the early 1980s, the Virunga population alone had dropped below 250 individuals. Poaching, habitat loss, and civil conflict in the region pushed the subspecies toward what many researchers considered inevitable extinction.
The turnaround came from sustained, layered effort. Daily monitoring by park rangers, where trackers follow every known gorilla group year-round, created a level of protection few wild animal populations receive. Veterinary teams intervene when gorillas are caught in snares set for other animals or show signs of respiratory illness. Community conservation programs around the parks gave local populations economic reasons to protect the gorillas rather than encroach on their habitat. Rwanda’s government, through the Rwanda Development Board, has been a long-term partner in research and protection efforts, particularly through the Dian Fossey Gorilla Fund’s Karisoke Research Center, which has monitored Virunga gorillas continuously since 1967.
Challenges remain. The gorillas’ tiny range sits in one of the most politically volatile regions on the planet, and the surrounding human population is growing rapidly. Climate change adds another layer of uncertainty, potentially shifting the vegetation zones these gorillas depend on.
Visiting Mountain Gorillas
Gorilla trekking is possible in all three countries, though Rwanda and Uganda handle the vast majority of tourism. Each country issues a limited number of daily permits to keep human contact with gorilla groups brief and controlled. Typically, a small group of visitors hikes into the forest with guides and trackers, spends one hour observing a habituated gorilla family, and hikes back out.
Rwanda charges $1,500 per permit for foreign tourists, making it the most expensive option. Foreign residents of Rwanda, East African citizens, Rwandan citizens, and African residents pay reduced rates of $200 to $500, though these promotional rates don’t apply during peak season from June through October 2025. Uganda’s permits are generally less expensive, and the DRC tends to be the most affordable, though access to Virunga National Park has been periodically restricted due to security concerns.
Best Time to Go
Mountain gorillas can be visited year-round, but the experience varies significantly by season. The forest trails are steep and muddy even in good conditions. During the rainy months, they become genuinely difficult, with slippery slopes and deep mud adding hours to the trek.
The dry seasons, from June through September and again from December through February, offer the most manageable trekking conditions. That said, rain can arrive without warning even in the dry months, so waterproof layers and sturdy boots are essential regardless of timing. The wettest periods run from October through November and from March through May. Permits during the rainy season are sometimes easier to secure and may come at lower promotional rates, which makes the tradeoff worthwhile for some visitors.