View Images The Ultra-Trail Mt. Fuji is a 104 mile (168 km) ultra-marathon that runs around the monolith, Mt. Fuji. The cumlative elevation gain nears 31,167 feet (9,500 m) and the cut-off time is 46 hours. Keep up with me as I train for the Mt. Fuji 100 Mile Ultramarathon in September!Infrequent (monthly) updates on my training and the progress of my beard. Oh, and some cool gear discounts too. Follow me! Thanks for following along.