Bwindi Impenetrable Forest National Park is renowned to be a home for about half of the overall gorilla population in the world with an estimated number of 400 individual gorillas inhabiting the dense thick forests. Both parks present opportunities to trek gorillas but Bwindi has more groups about 13 that have been habituated at 4 different sectors while Mgahinga has only one group of gorillas. But most travelers trek in Bwindi than the former.
Bwindi is called Impenetrable because of the thick vegetation and mountainous nature of the forests which makes it rather adventurous to hike. The park is at a relatively low altitude of 1,160 meters to 2,607 meters above sea level, this altitudinal range supports a variety of habitats ranging from low land forests to the rare afro montane vegetation a reason for its impressive list of other 120 mammals and many species of birds including those endemic to the Albertine rift. The forest is believed to have survived during the ice age dated some 25,000 years ago. The park was first declared a forest reserve in 1942 later it upgraded to a national park status in 1992 and became a UNESCO world heritage site 1994 in acknowledgment for its rich biodiversity.
Bwindi covers an area of 321 sq km of thick rain forests over steep ridges and low altitude depressions. The journey to the park is quite long and travelling can take over 8 hours of driving on road for about 512 km hence expect to spend the whole day in a car. For visitors who may be in a hurry to reach the national park, charter flights can fly from Entebbe Airport or kajjansi airfield to Kihihi airfield located a few kilometers from both parks.