33rd Hoshi no Sato Yamanaka Obena Mountain Ultra Marathon 100km Race (第33回 星の郷八ヶ岳野辺山高原100kmウルトラマラソン)

Nestled among the lush green mountains of Japan, this beloved ultramarathon has grown to celebrate its over thirty-year legacy. Runners can choose from three challenging distances tailored to their abilities: the grueling 100km course, the scenic 68km route, and a marathon-friendly 42km option.
Participants will experience breathtaking natural beauty as they navigate through verdant forests and across rolling hills, immersing themselves in the majesty of Japan's untamed landscapes. The event offers an unparalleled opportunity to connect with nature while testing personal limits on trails that wind through some of the country’s most pristine wilderness areas.
Registration fees vary by distance and age category: for general participants, 100km costs ¥23,000, 68km is ¥19,500, and 42km stands at ¥12,500. For those under 25 years old, the respective fees are ¥18,400 for 100km, ¥15,600 for 68km, and ¥10,000 for 42km.
This event promises an unforgettable journey through some of Japan’s most stunning natural settings on May 16, 2027.
Join a community of passionate runners who come together to honor the spirit of endurance in one of Asia's premier ultramarathons.