木曽山脈
The race starts at Toyama Bay in Sea of Japan at midnight and ends at Suruga Bay in the Pacific Ocean. Runners must cross traverse the Japanese Alps, Hida Mountains, the Kiso Mountains and the Akaishi Mountains. It is regarded as the most demanding trail race in Japan. The majority of competitors suffer hallucination due to stress and lack of sleep. Participants who cannot finish the race within 8 days are disqualified.