Ultra Running Hub Niigata Pref., Japan · Sunday, September 27, 2026
Fixed Distance 50 mi
Aga Ultra Marathon - 65km
Race completed
65 km Distance
not publishedn/a Climbing
3.3 est Grit · Challenging
Calculated from 65 km alone — the organiser has not published an elevation profile. Read 3.3 as a floor, not a verdict.
What the course asks
Time limit 8.5 hours
7:51 min/km average. Tight. Sustained running. Long aid-station stops will cost you. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 50 mi cut-offs we track. Measured against 486 races of the same distance. Cut-off calculator →
Field size ~80 Mid-sized. Company early, well spread out by halfway.
DUV results for the 2025 edition (60km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, September
Daylight 12 h 01 m of light
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 60km | 80 | Tatsuya Yamamoto · 04:51:27 | Reiko Ito · 06:00:11 |
| 2023 | 56km | 72 | Yusuke Ishida · 04:56:49 | Naomi Ikeda · 05:08:23 |
| 2022 | 66km | 38 | Kenichi Yoshimura · 04:30:35 | Reiko Ito · 05:51:28 |
| 2021 | 68km | 8 | Tetsuya Takeishi · 06:00:00 | Naomi Ikeda · 06:39:00 |
| 2019 | 68km | 47 | Shoki Fukumoto · 05:53:34 | Mayumi Kobayashi · 07:39:36 |
The field grew 11% between 2023 (72) and 2025 (80). 21% of the 2025 field were women.
DUV results for the 2025 edition (60km) — 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 65 km of trail.
- Trail Running Shoes 65 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 65 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 65 km, without the bounce.
- GPS Watches Battery life first — a 65 km day outlasts most full-GPS modes.
Similar races
Other 50 mi trail ultras, closest in distance first.