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Saroma Lake 100km Ultra Marathon Online Challenge 2 Month 100km Stage 1 (Oct-Nov) (サロマ湖100kmウルトラマラソンオンラインチャレンジ【2month 100km Stage1（10-11月）】)

Name: Saroma Lake 100km Ultra Marathon Online Challenge 2 Month 100km Stage 1 (Oct-Nov) (サロマ湖100kmウルトラマラソン オンラインチャレンジ【2month 100km Stage1（10-11月）】)
Start: 2026-10-01
End: 2026-10-01

Gunma, Japan

calendar_today 01 Oct, 2026

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About the Event

Join runners from around the world for an online challenge inspired by Japan's iconic Saroma Lake 100km Ultra Marathon. This virtual race offers participants a chance to experience the spirit and camaraderie of one of Japan’s most revered ultra-distance events, even if you can't make it to Hokkaido in person.
The Saroma Lake course is renowned for its scenic beauty and challenging terrain, winding through picturesque landscapes that include serene lakeside paths and rugged forest trails. Participants will have the opportunity to immerse themselves in this legendary race from anywhere in the world, logging their miles on a platform designed to track progress and share achievements with fellow runners.
Choose your distance: Whether you're aiming for the full 100km or a shorter yet still formidable challenge, there are options that cater to various levels of experience. Entry fees range from ¥4,990 to ¥12,990, offering flexibility in both commitment and cost. As you run, connect with other participants through social media channels dedicated to the event, sharing tips, stories, and encouragement.
This virtual edition is perfect for those who have already conquered Saroma Lake or dream of doing so someday. It provides a platform where runners can push their limits while enjoying the support of a global community united by a love for ultra-distance running.
Experience the magic of Japan's longest-running ultramarathon without leaving home, and be part of an event that celebrates endurance, beauty, and the runner’s journey through breathtaking landscapes.

Races Offered

2 Month 100km Stage 1 (November-December)

Oct 01, 2026

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Distance — 100K

terrain

Type — Running

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43 days remaining

2 Month 100km Stage 2 (November-December)

Oct 01, 2026

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Distance — 100K

terrain

Type — Running

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43 days remaining

November 1month 100km

Oct 01, 2026

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Distance — 100K

terrain

Type — Running

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43 days remaining

October 1month 100km

Oct 01, 2026

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Distance — 100K

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Type — Running

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43 days remaining

September 1month 100km

Oct 01, 2026

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Distance — 100K

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Type — Running

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43 days remaining

Year end 1month 100km

Oct 01, 2026

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Distance — 100K

terrain

Type — Running

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43 days remaining

Weather History

These values represent the 3-year monthly averages for October in .

thermostat Temperature

9.0° / 16.5°

wb_sunny Feels like

7.4° / 15.3°

light_mode Avg sunshine hours

7h 46m

water_drop Avg rainfall

4.0 mm

ac_unit Avg snowfall

—

air Avg wind speed

6.1 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (4.0)

humidity_mid Humidity

82.2%

wb_twilight Sunrise

05:50

nightlight Sunset

17:06

Hotels & Places to Stay

Runner Reviews

Read what other athletes have to say about their experience at the Saroma Lake 100km Ultra Marathon Online Challenge 2 Month 100km Stage 1 (Oct-Nov) (サロマ湖100kmウルトラマラソンオンラインチャレンジ【2month 100km Stage1（10-11月）】).

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