Tumunong Hallu

Tumunong Hallu Beach, the Coastal Forest of Borneo

Whenever people talk about forest conservation, they would think that only the inland rainforest is worth protecting. Malaysian estate developers love to build condominium and resorts along seaside, as the sea view property is more marketable. As a result, there are very few pristine “beach forest” (coastal forest) left in Sabah, and most of us don’t know that the coastal forest of Borneo is also an important part of our forest ecology matrix.

Mt. Silam and Darvel Bay
Pic: Tumunong Hallu is at the coast of Darvel Bay, far behind is Mt. Silam.

Tumunong Hallu Conservation Area, which is along the coast of Darvel Bay, Lahad Datu (see location map), is one of the best examples of Borneo coastal forest and the first coastal conservation area. This 5.8-KM² fully protected forest is managed by Yayasan Sabah Foundation for research and education purposes. They consider opening the area for tourism too in future, as the beautiful beaches there are suitable for recreational activities. For now, it is a hidden treasure.

scenery in Darvel Bay
Thanks to Bike and Tours, I learnt about Tumunong Hallu last year. Tumunong Hallu is about 20 KM from Lahad Datu town and accessible by road, but we go by boat so we could cruise around the islands of Darvel Bay. We saw mangrove forest, water villages, fish farms and fishing platform on the way.

marine police patrol
Then a marine police patrol approached our boat. I sweated a bit because I thought we entered the restricted area.

marine police
Well, it happens that they know our boatman and would like him to help sending something to Tumunong Hallu, phew…

Tour package to Kinabatangan

fishing in Darvel Bay

fisherman in Darvel Bay
I also saw a lot of fishermen and fishing structure named Selambau (see photo below). Seem like everyone lives in Darvel Bay fish for a living.

Selambau fishing structure
Pic: Selambau fishing structure built by Sea Bajau fishermen

The Beach of Tumunong Hallu

After an hour, we arrived the beach of Tumunong Hallu.

Tumunong Hallu
Pic: Tumunong Hallu and its beautiful sea water.

Since you can view the following photos, I don’t need to write too much to describe how inviting and tranquil the sea water is…

sea of Tumunong Hallu

Tumunong Hallu

beach of Tumunong Hallu

The seabed is rocky with layer of smooth silt, and the beach is covered by dark sand, all these are the characteristics of forested beach.

sand of Tumunong Hallu Beach

Besides the land, Tumunong Hallu also includes the sea area with rich marine biodiversity such as coral reef, and two nearby islands, i.e. Saranga and Tabun Islands, into its 1,600-Hectare conservation area.

camping site of Tumunong Hallu
Pic: shelter and kitchen near the beach. This place is nice for camping too.

Silam grass
Pic: The shore is carpeted by lush Silam grass.


The researches show that Tumunong Hallu has 81 plant species comprising coastal and inland vegetation. The best way to explore the interesting mixture of mangrove and dipterocarp forest here is by jungle trekking.

jungle trekking in Tumunong Hallu

We tried the shorter nature trail that is only 3 KM one way (then taking a boat back to starting point). If you have more time, you can hike the longer trail to the hilltop, which takes 4 to 5 hours, to have a nice view of the beach and forest.

beach forest of Tumunong Hallu

Two forestry rangers, Yapdi and Azwan, were accompanying us and share some interesting facts about this forest. The trail is easy to walk and the jungle is not warm and humid as the rainforest, due to the sea breeze.

big earthworm
The soil here is quite fertile, evidenced by a big earthworm I found on forest floor.

climbing to Ara Viewpoint
Pic: we took a short climb to Ara Viewpoint, which is a knoll near to a beach.

There was strong scent of Kayu Malam tree in the air of this slope. This wood is a famous aphrodisiac among local ladies if I’m not mistaken.

Ara Viewpoint
Pic: Nova cooling off on Ara Viewpoint. Note the dense Pandanus trees at her background.

Ara Viewpoint
Pic: nice sight from Ara Viewpoint

We also checked out the Nunuk Beach not far away.

Nunuk Beach
Pic: Nunuk Beach

lonely mangrove tree
Pic: a lonely mangrove tree

The coastal forest is not just a collection of dull trees. Among mangrove, seaside hill and beach forests, there are some interesting and unique trees, such as the Keruing tree below.

Keruing Tree
Pic: this Keruing tree looks like being vandalized. Actually the “cut” is a natural feature of its bark.

Nunuk tree
Pic: the tree in the coastal forest can be big and tall too, like the Nunuk Tree shown in photo above.

bark of Nunuk tree
Pic: beautiful white stripes on the bark of Nunuk Tree.

Bao-Bao Tree
Pic: Bao-Bao tree, a softwood with white bark

If there are trees, there must be wildlife. I didn’t see a lot of wildlife, but studies say some birds (e.g. Great slaty woodpecker) and mammals (Long-tailed Macaque, Barking deer, Sambar deer) are the residents of this forest. We were hungry after one hour of hiking, so we took a boat back to the starting point for lunch.

Amenities at Tumunong Hallu

As this beach is not frequented by tourists, the facilities are basic but good enough for camping. There is no resort, restaurant and shop here. If you want to cook, you have to bring your own cooking utensils and gas stove.

hut in Tumunong Hallu
Pic: shelter and a kitchen (at the right)

toilet of Tumunong Hallu
Pic: toilet and changing room

kitchen of  Tumunong Hallu
Pic: small kitchen with sink and water supply, benches and table for dining.

having lunch at Tumunong Hallu
Pic: enjoying lunch with Nova, my partner in crime, and Simon from Bike and Tours. Don’t know why. Food always tastes great at seaside.

Indian food
Pic: Yummy Indian food prepared by Tisha and Simon from Bike and Tours, the curry and sour vegetables were so appetizing… They really know how to cook and present the food. This friendly couple receives a lot of positive feedbacks at TripAdvisor.

swimming in Tumunong Hallu
Hey, we were at the beach so we must soak ourselves in warm tropical sea water to conclude the tour. The whole beach was ours to enjoy. Overall, it’s a wonderful experience.

The video below shows the beach of Tumunong Hallu:

More Photos

Created with flickr badge.

Even though Tumunong Hallu is not a popular destination now, being unfamous doesn’t mean that it has no potential. If it is open to public in future, you must visit this place. At the moment, you can arrange a tour with Bike and Tours for a trip to Tumunong Hallu.

Photos taken in Lahad Datu, Sabah, Malaysia Borneo

2 thoughts on “Tumunong Hallu Beach, the Coastal Forest of Borneo

  1. Quite apparently, there seem to be more places to discover on the East coast of Sabah than on the West. This is so unheard of. Thanks for sharing this. 🙂

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