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

Fixed Distance Marathon

Soi Malai Trail Winter 45 km

87 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 Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it.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.

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 Shoes45 km of trail — cushioning that is still there in the last quarter.
Race Nutrition45 km of self-supported fuelling between aid stations.
Hydration VestsFlask capacity for 45 km, without the bounce.
HeadlampsA 14 h limit puts you out there after dark.
GPS WatchesBattery life first — a 45 km day outlasts most full-GPS modes.

Adidas