A bit later on the calendar in 2026 due to a rather late lunar new year in most parts of Asia, BUTM will celebrate its 10th anniversary edition on the weekend of 11/12 April. Taking place in Kiulu, Sabah, the event programme retains its 100km and 50km categories, which both offer points for the ATM Championship ranking. The 100 is of course also valid for the Grandmaster Quest.

Borneo Ultra Trail Marathon, in short BUTM, is really no longer the “little sister” of TMBT. Organised by the same team, BUTM is a wonderful event in itself taking place in a different part of Sabah, in and around Kiulu. For international runners the set-up is very similar: you fly into Kota Kinabalu and can base yourself in the city. Shuttle busses will take runners to the starting line at night. The 100km and 50km races start together at 6 am.

The overall layout of the race courses with start and finish area at Kiulu will be retained, but the actual location has been changed as the Riverside Park has been closed due to ongoing construction works for a road bridge. Having Kiulu as a central start/finish area works well logistically and is convenient for runners - in particular for those driving to the venue themselves. All race categories make single loops out from the start/finish area. The 100km is still kind of a figure 8 loop. The 50km keeps the redesign that was done last year. While the total elevation gain of 5270 hm for the 100km is not excessive (2315hm for the 50km), the heat and humidity can make it feel a lot more than that. Unless it rains like last year, turning some parts of the course into genuine mudfests. In general, BUTM is a pure jungle trail experience!

Registration for the event is open and can be done after checking the website with the necessary details to read. Pay attention to the mandatory gear list and requirements. The organisers here are very serious about it and for good reason. .

website BUTM

facebook page butm

BUTM: a bit later this year on 11 April