Pekan Tamparuli, Kota Kinabalu, Malaysia · Saturday, April 3, 2027

Fixed Distance 50K

Borneo Ultra Trail Marathon BUTM - 50 km

147 days away

50 km Distance

2,230 m Climbing

5.8 Grit · Challenging

5.9749° N, 116.0724° E© OpenFreeMap © OpenMapTiles Data from OpenStreetMap

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 1087 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.

Typical conditions, April

Daytime high 28°C

Night low 23°C

Rainfall Showers likely

Daylight 12 h 11 m of light

Regional 2001-2020 average for April — NASA POWER, grid elevation 468 m. Not a forecast.

The Aid Station

Course-specific beta from the community

⛰️ terrain

This is a mountain course. Poles are highly recommended for the sustained climbs.

By UltraHub Expert

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

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.

New Balance

Fuel Cell Super Comp Trail

★★★★★ 4.5

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Komperdell

Carbon Ultralight Vario 4

4-section folding carbon poles with compact pack size for mandatory gear.

$160 ★★★★★ 4.5

Nitecore

UT32

Dual-beam trail running headlamp (1100 lumens) with spot and flood beams.

$100 ★★★★★ 4.5

All gear guides →

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.