Muraoka, Hyogo Pref., Japan · Sunday, September 27, 2026

Fixed Distance 50 mi

Muraoka 88 km Ultra Marathon

Race completed
88 km Distance
800 m Climbing
5.6 Grit · Challenging
35.4706° N, 134.5983° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 9 m / km Fast & Flat. This course is relatively flat and fast. Ideal for PB attempts.
Time limit 14 hours 9:33 min/km average. Tight. Room to walk the climbs and stop at aid. Tighter than 81% of 50 mi races. Measured against 477 races of the same distance. Cut-off calculator →
Field size ~218 Large. Rarely out of sight of another runner.

DUV results for the 2025 edition (88km) — 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 88km 218 Katsushi Akaike · 06:51:24 Shima Urabe · 09:09:54
2024 88km 161 Kohei Miyagaki · 06:47:59 Naoko Ito · 08:58:05
2023 88km 167 Masashi Noguchi · 08:10:17 Miyuki Asada · 09:11:08
2019 88km 237 Masashi Noguchi · 07:45:47 Miyuki Asada · 09:43:19
2017 88km 242 Yu Yasuda · 06:51:41 Naoko Ito · 09:42:41
2016 88km 194 Yu Yasuda · 07:33:34 Asami Iri · 08:19:45
2015 88km 217 Yu Yasuda · 07:44:48 Asami Iri · 08:04:48
2014 88km 215 Yu Yasuda · 06:41:11 Asami Iri · 08:12:27
2013 88km 156 Hisashi Inaji · 07:19:12 Hiroko Kamikawa · 09:03:08
2012 88km 152 Hisashi Inaji · 07:28:40 Hiroko Kamikawa · 08:49:03

The field grew 35% between 2024 (161) and 2025 (218). 32% of the 2025 field were women.

DUV results for the 2025 edition (88km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

  • terrain This is a fast & flat course. Expect fast, runnable sections where rhythm is key.
  • gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 88 km of trail with 800 m of ascent.

  • Trail Running Shoes 88 km of trail — cushioning that is still there in the last quarter.
  • Race Nutrition 88 km of self-supported fuelling between aid stations.
  • Hydration Vests Flask capacity for 88 km, without the bounce.
  • Headlamps A 14 h limit puts you out there after dark.
  • GPS Watches Battery life first — a 88 km day outlasts most full-GPS modes.
All gear guides →

Overview

The Muraoka 88 km Ultra Marathon was a road race held in Muraoka, Hyogo Pref., Japan. Featuring 800 meters of total elevation gain over 88 kilometers—amounting to 9.1 meters of climb per kilometer—the paved profile kept the terrain running relatively fast compared to steep mountain events.

Time limits demanded steady management on course. The 14-hour limit required a minimum pace of 9.5 minutes per kilometer, making the cut-off tighter than 81% of 50mi races and more generous than only 19%.

The event drew a substantial turnout for the category, posting a field bigger than 90% of 50mi peers and smaller than 10%, with 218 runners completing the 2025 edition across its 10-edition run.

Similar races

Other 50 mi trail ultras, closest in distance first.