Doi Soi Malai, Thailand · Saturday, December 12, 2026

Fixed Distance Marathon

Soi Malai Trail Winter 45 km

73 days away

45 km Distance

not publishedn/a Climbing

2.3 est Grit · Entry level

Calculated from 45 km alone — the organiser has not published an elevation profile. Read 2.3 as a floor, not a verdict.

17.1512° N, 98.8447° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 14 hours 18:40 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the most forgiving Marathon cut-offs we track. Measured against 43 races of the same distance. Cut-off calculator →

Field size ~205 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (45km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, December

Daytime high 25°C

Night low 16°C

Rainfall Dry — rain unlikely

Daylight 11 h 07 m of light

Regional 2001-2020 average for December — NASA POWER, grid elevation 542 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	45km	205	Paween Kongyai · 05:21:32	Sirikanya Phoobuaphet · 06:47:43

43% of the 2025 field were women.

DUV results for the 2025 edition (45km) — 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

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 45 km of trail.

Trail Running Shoes 45 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 45 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 45 km, without the bounce.
Headlamps A 14 h limit puts you out there after dark.
GPS Watches Battery life first — a 45 km day outlasts most full-GPS modes.

Adidas

Terrex Agravic Speed Ultra

RunRepeat found the Adidas Terrex Agravic Speed Ultra to be perfect for midfoot and forefoot strikers, while iRunFar noted that the shoe feels incredibly effici…

★★★★★ 4.5

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

Tailwind