Ultra Running Hub Pekan Tamparuli, Kota Kinabalu, Malaysia · Saturday, April 3, 2027
Fixed Distance 50K
Borneo Ultra Trail Marathon BUTM - 50 km
199 days away
50 km Distance
2,230 m Climbing
5.8 Grit · Challenging
What the course asks
Climbing rate 45 m / km
Mountain. Significant climbing. Steep sections will require power hiking.
Time limit 17 hours
20:24 min/km average. Generous. Walkable throughout for most of the field. Among the most forgiving 50K cut-offs we track. Measured against 1007 races of the same distance. Cut-off calculator →
Field size ~310 Large. Rarely out of sight of another runner.
DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
The Aid Station
Course-specific beta from the community
This is a mountain course. Poles are highly recommended for the sustained climbs.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail with 2,230 m of ascent.
- Trail Running Shoes45 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition50 km of self-supported fuelling between aid stations.
- Hydration VestsPole attachment and chest-strap stability on steep ground.
- Trekking Poles2,230 m of ascent to walk up.
- HeadlampsA 17 h limit puts you out there after dark.
Course Notes
The BUTM with 4 distances is set in the jungle and mountains of North Borneo. The trails will take runners on tracks and trails over steep ridges and river valleys with aid stations in quaint native villages.
Similar races
Other 50K trail ultras, closest in distance first.