As Lambir Hills National Park is the last intact patch of lowland dipterocarp forest left in Sarawak it is an important refuge for species that have been heavily logged elsewhere.

Among the tallest trees in the national park is the tapang (Koompassia excelsa), which can grow more than 80 metres tall, and which honey bees like to build their hives on.

[9] Several research institutes have collaborated on long-term studies of the Lambir's natural history and many individual MSc or PhD students have completed their fieldwork there.

With its picturesque waterfalls, good birdwatching and impressive tall trees, the park is popular with tourists, especially at weekends when more people from Miri travel there for a day visit.

These range from short and fairly flat walks to the long and sometimes steep trek to the summit of Bukit Lambir, the tallest point in the park.