The Borneo Ultra-Trail Marathon (BUTM) is one of South-East Asia’s top trail races. Organised by Borneo Ultra Trails who also organise the iconic TMBT Ultra-Trail Marathon, the BUTM offers trail-runners of all abilities a journey through Sabah’s Kiulu Valley.

The BUTM is not just for elite athletes. The BUTM is not all about blood, sweat and tears. It’s not all about pain and suffering (though there is sometimes, some of that too).

The BUTM is all about the love of running on trails, in some of the most beautiful countryside in Malaysia. The trails take you over the hills and vales in the Kiulu Valley, Sabah’s adventure wonderland, the valley of a hundred bridges. It takes you over crystal-clear mountain rivers, bubbling mountain streams and through idyllic native villages located in North Borneo’s Crocker Range. If you love nature and enjoy being out in the outdoors, if you are reasonably fit and like to run, then the BUTM may just be the thing for you. We offer four distance categories: 9km, 30km, 50km and 100km.