Yilan Dongshan River 50mi Ultra-Marathon

34 days away

80 km Distance

not publishedn/a Climbing

4.0 est Grit · Challenging

Calculated from 80 km alone — the organiser has not published an elevation profile. Read 4.0 as a floor, not a verdict.

23.9145° N, 121.0441° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 15 hours 11:15 min/km average. Comfortable. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 50 mi. Measured against 477 races of the same distance. Cut-off calculator →

Field size ~22 Small. Long stretches with nobody in sight.

DUV results for the 2025 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, November

Daytime high 19°C

Night low 12°C

Rainfall Showers likely

Daylight 10 h 55 m of light

Regional 2001-2020 average for November — NASA POWER, grid elevation 1323 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50mi	22	Yu-Che Liu · 06:34:48	Li-Ching Hseuh · 08:50:55
2024	50mi	24	Hung-Pin Lee · 06:58:10	Miao-Shuang Lin · 08:36:07
2023	50mi	10	Ching-Feng Chen · 08:23:14	Chin-Juan Tsai · 10:01:42
2022	50mi	13	Chia-Ming Chang · 07:41:51	Yi-Chia Lee · 09:24:58
2021	50mi	1	—	Ying-Chih (Sunday) Wang · 10:15:53

The field shrank 8% between 2024 (24) and 2025 (22). 18% of the 2025 field were women.

DUV results for the 2025 edition (50mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

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

Gear for this race

Chosen for 80 km of trail.

Trail Running Shoes 80 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 80 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 80 km, without the bounce.
Headlamps A 15 h limit puts you out there after dark.
GPS Watches Battery life first — a 80 km day outlasts most full-GPS modes.