Yubetsu, Japan · Sunday, June 28, 2026

Fixed Distance 50K

Lake Saroma 50 Km Ultramarathon

Race completed
50 km Distance
not publishedn/a Climbing
2.5 est Grit · Entry level

Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.

Register with organiserRegister ↗ Add to calendar
44.1515° N, 143.5730° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 8 hours 9:36 min/km average. Comfortable. Room to walk the climbs and stop at aid. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 89% of 50K races. Measured against 999 races of the same distance. Cut-off calculator →
Field size ~452 Large. Rarely out of sight of another runner.

DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, June

Daytime high 19°C
Night low 10°C
Rainfall Mostly dry
Daylight 15 h 29 m of light

Regional 2001-2020 average for June — NASA POWER, grid elevation 190 m. Not a forecast.

Results history

Year Race Finishers Men's winner Women's winner
2026 50km 452 Masahiro Watanabe · 03:07:56 Virginia Lo · 03:22:50
2025 50km 377 Kanata Mizote · 03:17:25 Mikiko Matsuda · 04:11:50
2024 50km 368 Tatsu Arai · 03:20:56 Kana Shiozaki · 04:09:56
2023 50km 363 Masayuki Abe · 03:24:59 Mikiko Matsuda · 04:06:31
2019 50km 423 Masayuki Abe · 03:14:49 Ayaka Mori · 04:14:26
2018 50km 413 Kazuyuki Meutsuri · 03:27:23 Kaori Yoshida · 03:18:34
2017 50km 396 Shoma Otagiri · 03:13:17 Noriko Arakawa · 03:58:49
2016 50km 447 Kazuyuki Meutsuri · 03:10:26 Mitsuko Hirose · 03:37:33
2015 50km 455 Seiya Ichihashi · 03:17:08 Haruka Suzuki · 03:34:56
2014 50km 389 Kazuyuki Meutsuri · 03:20:41 Yuki Nose · 04:24:54

The field grew 20% between 2025 (377) and 2026 (452). 35% of the 2026 field were women.

DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

The Aid Station

Course-specific beta from the community

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 50 km of road.

  • Trail Running Shoes 50 km of road — cushioning that is still there in the last quarter.
  • Race Nutrition 50 km of self-supported fuelling between aid stations.
  • Hydration Vests Flask capacity for 50 km, without the bounce.
  • GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Salomon

Sense Ride 5

★★★★★ 4.5

Adidas

Adizero Evo SL

★★★★★ 4.7

Skratch Labs

Sport Hydration Mix

Clean electrolyte drink mix with real fruit flavor. Low sugar.

$20 ★★★★★ 4.5

Naked

Running Band

Minimalist waist-mounted running band. Ultra-light alternative to a vest for shorter races.

$60 ★★★★☆ 4.3

Garmin

Enduro 3

Ultra-endurance GPS watch with solar charging and 300+ hour battery in GPS mode.

$900 ★★★★★ 4.8
All gear guides →

Similar races

Other 50K road ultras, closest in distance first.