Mt. Fuji International Marathon
Race Day Weather
Cool start, mild finish
Runners will face temperatures starting at 47°F and rising to 53°F. With humidity at 67% and a light breeze from the south, conditions will be comfortable overall. Adjust pacing conservatively during the first half as the temperature increases. A light throwaway layer is advisable for the pre-race wait due to the cooler feel.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Mt. Fuji International Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Mt. Fuji International Marathon runs a single lap around Lake Kawaguchi and Lake Saiko in Fujikawaguchiko, Yamanashi Prefecture, with Mount Fuji visible for more than half the course. The full marathon starts and finishes at the Funatsuhama lakeside parking area on Lake Kawaguchi's shore. Starting with the 2026 edition the race weekend expanded to two days, adding a Fuji View Run and Fuji View Walk alongside the full marathon, a roughly 17km lap of Lake Kawaguchi, and a charity fun run. The course is JAAF-certified and the race is a Boston Marathon qualifier.
