Every year one of the most anticipated events on the ATM Championship calendar is Borneo TMBT Ultra in Sabah, Malaysia. The 11th edition of the Southeast Asia classic mountain jungle trail is scheduled for 2/3 September, and as usual both the 100km and the 50km are points races for the Championship rankings. Registrations are closing end of this month.

Milton Amat has been the local hero over the past years following two famous victories against Japan’s Hisashi Kitamura. The latter has indicated he will be back again this season for a ‘third time lucky’ attempt. In the women’s 100k, the local home crowd now also has a major contender for the prestigious race win: Rejlen James. Having returned this season after a few years off and pregnancy, James won BUTM 100 and the Borneo Miler in impressive fashion. Sabah of course has an incredible trail running community, and the vibe and support is what makes TMBT even more special.

Technically it is not the toughest 100km on the calendar, but many argue it is therefore the most-balanced century run. There’s longish runable sections alternating with steep muddy single trails, with Mount Kinabalu almost always within sight. The 50k does have a very tough uphill finish - rather unique in ATM, and has seen some incredible scenes over the years. TMBT is not only one of the most exotic events, but also ranks consistently amongst the best organised, despite the absence of big or loud thrills (considered another big plus for the event according to many, in fact!) . TMBT is trail running in its purest form.

There’s several shorter race categories and a nighttime race on offer, if you’re not looking for ATM points.

Come prepared in any case, as the heat and humidity of Borneo always plays its role in the races. Registration goes via the website, where you can also read the conditions of entry the competition regulations. Access by clicking the button below.

A race summary of last year’s event is also re-posted for your viewing.

borneo tmbt ultra website