Ulu Temburong National Park was the first national park to be established in Brunei in 1991. The park is in Temburong District in eastern Brunei, and covers about 40% of the district in the south at 550 square kilometres (210 sq mi). The principal rivers are the Temburong and Belalong Rivers. It is an important ecotourism centre in Brunei and hosts the Ulu Ulu Resort.
The park, which can only be reached by river, is only accessed by longboats. Travel from Bangar town to Batang Duri is by road and it is the starting destination for travel by longboats along the Temburong River into the Park. The boats are plied by experienced Iban people winding through sand bars, logs and boulders. An extensive network of boardwalks, bridges and stairways, 7 kilometres (4.3 mi) in length, have been constructed to visit all regions of the park. Interpretation boards provide information along the way. There is also a canopy viewing walkway. This walkway, built with steel towers supporting the cable way, rises to height of 50 metres (160 ft) above the forest floor overlooking the highest tree canopy and provides vistas of the forests.
The only accommodation inside the National Park, Ulu Ulu Resort was opened in November 2008 with the privatization of the facilities in Ulu Temburong National Park under the authority of the Forestry Department.
The 17-room resort is a low-density and environment friendly accommodation. There are three room categories; Standard (dormitory), Superior (twin share and family suites) and Deluxe (double bed). The resort has a conference room, auditorium, restaurant, gift and souvenir shop and games room. To stay at the resort, visitors are required to make advance booking of a Ulu Temburong National Park tour package.