Ulu Temburong is only accessible by boat. From the capital of Bandar Seri Begawan water taxis take about one hour to ply the route to the main town of Bangar in Temburong District. This allows the visitor a glimpse of the mangrove forests which line the muddy delta of the Limbang River flowing out of Sarawak into Brunei Bay. With luck, Proboscis Monkeys may be sighted along this route, however these are more likely to be seen in early morning or late afternoon.