The remote region was inhabited by various Tibetan and Qiang peoples for centuries, but was not officially discovered by the government until 1972. Extensive logging took place until 1979, when the Chinese government banned such activity and made the area a national park in 1982. An Administration Bureau was established and the site officially opened to tourism in 1984; layout of facilities and regulations were completed in 1987. The site was inscribed by UNESCO as a World Heritage Site in 1992 and a World Biosphere Reserve in 1997.
Since opening, tourist activity has increased every year: from 5,000 in 1984 to 170,000 in 1991, 160,000 in 1995, to 200,000 in 1997, including about 3,000 foreigners. Visitors numbered 1,190,000 in 2002. As of 2004[update], the site averages 7,000 visits per day, with a quota of 12,000 being reportedly enforced during high season. The Town of Zhangzha at the exit of the valley and the nearby Songpan County feature an ever-increasing number of hotels, including several polished five-stars, such as Sheraton.
Jiuzhaigou (literally "Nine Village Valley") takes its name from the nine Tibetan villages along its length. Seven of them are still populated today. The main agglomerations that are readily accessible to tourists are Heye, Shuzheng and Zechawa along the main paths that cater to tourists, selling various handicrafts, souvenirs and snacks. There is also Rexi in the smaller Zaru Valley and behind Heye village are Jianpan, Panya and Yana villages. The Valley's no longer populated villages are Guodu and Hejiao.
Finally, the Penbu, Panxing and Yongzhu villages lie along the road that passes through the town of Jiuzhaigou/Zhangza outside the valley.
In 1997, the permanent population of the valley was about 1000, made up of about 130 Tibetan families. Due to the protected nature of the park, agriculture is no longer permitted so the locals now rely on tourism and local government subsidies to make a living.
Jiuzhaigou's ecosystem is classified as temperate broad-leaf forest and woodlands, with mixed mountain and highland systems. Nearly 300 km2 (116 sq mi) of the core scenic area are covered by virgin mixed forests. Those forests take on attractive yellow, orange and red hues in the autumn, making that season a popular one for visitors. They are home to a number of plant species of interest, such as endemic varieties of rhododendron and bamboo.
Local fauna includes the endangered giant panda and golden snub-nosed monkey. Both populations are very small (less than 20 individuals for the pandas) and isolated. Their survival is in question in a valley subject to increasing tourism. Jiuzhaigou is also home to approximately 140 bird species.