Muraoka 64 km Ultra Marathon

Race completed

64 km Distance

not publishedn/a Climbing

3.2 est Grit · Challenging

Calculated from 64 km alone — the organiser has not published an elevation profile. Read 3.2 as a floor, not a verdict.

35.4706° N, 134.5983° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 14 hours 13:08 min/km average. Comfortable. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. More forgiving than 75% of 50 mi races. Measured against 477 races of the same distance. Cut-off calculator →

Field size ~586 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (64km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, September

Daytime high 25°C

Night low 19°C

Rainfall Wet — expect rain

Daylight 12 h 01 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 242 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	64km	586	Yoshiyuki Asami · 03:42:11	Yuri Hashimoto · 04:58:38
2024	64km	332	Tsutomu Hattori · 05:36:41	Kana Takahashi · 06:01:03
2023	66km	240	Katsushi Akaike · 05:08:29	Naoko Matsushita · 06:26:34
2019	66km	233	Tadashi Sekime · 05:32:28	Kaori Fukumoto · 06:41:17
2017	66km	312	Masateru Inoue · 05:17:21	Kaori Fukumoto · 06:35:09
2016	66km	244	Takashi Nagayama · 05:24:40	Ryoko Hashimoto · 06:04:42
2015	66km	327	Kohei Miyagaki · 05:22:20	Ryoko Hashimoto · 05:55:57
2014	66km	331	Satoshi Nomoto · 05:20:22	Ryoko Hashimoto · 06:21:37
2013	66km	385	Hiroshi Maekawa · 05:01:59	Chie Tsujii · 05:57:33
2012	66km	244	Takatsugu Kakihara · 05:23:25	Asami Iri · 06:03:32

The field grew 77% between 2024 (332) and 2025 (586). 31% of the 2025 field were women.

DUV results for the 2025 edition (64km) — 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 64 km of trail.

Trail Running Shoes 64 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 64 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 64 km, without the bounce.
Headlamps A 14 h limit puts you out there after dark.
GPS Watches Battery life first — a 64 km day outlasts most full-GPS modes.

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Spring Energy