FUJI100mi
Mt. Fuji 100
Fuji City (Mount Fuji Children's World), Shizuoka → Fujiyoshida (Fuji Hokuroku Park / Fujisan no Meisui Stadium), Yamanashi
Race guide
Updated 19 July 2026
The Mt. Fuji 100 (FUJI100mi) is a 167 km loop circumnavigating Mount Fuji with 6,319 m of total elevation gain, starting in Fuji City, Shizuoka and finishing at Fuji Hokuroku Park (Fujisan no Meisui Stadium) in Fujiyoshida, Yamanashi. The course passes through the Fujinomiya foothills on the southern slopes, threads the Fuji Five Lakes — Motosu, Shoji, Kawaguchi, Oshino, and Yamanaka — before climbing over Nijumagari Pass at 1,262 m and descending back into Fujiyoshida. Despite a relatively modest high point of 1,632 m, this is a demanding technical race: the elevation is relentlessly rolling, the terrain mixes packed trail, forest singletrack, and mountain roads, and the final cut-off at the finish is Day 2 at 14:30, leaving little room for error across the full distance.
Course & Terrain Overview
The race begins at Mount Fuji Children's World in Fuji City at 838 m and immediately sends runners south and west through the forested lower flanks of Fuji. The first major checkpoint, F1 Fujinomiya, arrives at 25.3 km and 513 m elevation — a net descent from the start that lulls some runners into going too fast. From Fujinomiya the route climbs back toward Fumoto (F2, 51 km, 782 m), a crew-access point and a natural reset marker at the race's first third. The middle section is the most technically varied: from Fumoto the course climbs to Lake Motosu (F3, 61.3 km, 1,124 m), the highest of the five lakes and a location notorious for cold air and wind off Fuji's western face. It then drops to Lake Shoji (F4, 73.1 km, 937 m) before a long rolling traverse brings runners to Fuji-Q Highland / Kawaguchiko (F5, 96.4 km, 867 m), another crew point and the psychological halfway marker. From Kawaguchiko the course heads east through Oshino (F6, 112.4 km, 1,030 m) and on to Lake Yamanaka (F7, 124.7 km, 999 m) before the final major climb to Nijumagari Pass.
Decisive Climbs and Where the Race Is Won or Lost
Three sections separate the finishers from the DNFs. The climb from F2 Fumoto to F3 Lake Motosu — roughly 10 km with significant gain to 1,124 m — comes after 51 km of running and is where fatigue first bites hard. Runners who have gone too fast in the opening Fujinomiya descent often crack here. The second crux is the extended traverse from F5 Kawaguchiko (96.4 km) through F6 Oshino (112.4 km) to F7 Lake Yamanaka (124.7 km): this 28 km stretch spans the race's deepest night hours, covers rolling, technical ground, and climbs back above 1,000 m repeatedly. Mental resilience and disciplined pacing through this section define the race's outcome. The final reckoning is the climb to Nijumagari Pass (F8, 138.2 km, 1,262 m) — arriving here at roughly the 130–138 km mark with heavy legs, it requires a genuine effort to summit. The subsequent descent to Fujiyoshida (F9, 152 km, 689 m) is fast but punishing on quads, and the final 15 km back up to the finish at Fuji Hokuroku Park (1,007 m) is a sting in the tail that surprises many runners who assumed the race was done after F9.
Pacing & Fueling Strategy
Start conservatively on the descent from Fuji City to Fujinomiya — the temptation to bank time is real, but burning your quads in the first 25 km will cost you dearly at Nijumagari Pass. A practical approach is to treat Fumoto (F2, 51 km) as the first real check-in with yourself: if you feel strong here, maintain effort; if not, eat, sit briefly, and reset. Crew access at F2, F4, F5, and F7 gives you four opportunities to restock drop bags and get fresh nutrition — use them deliberately rather than rushing through. Given the total distance of 167 km and the cut-off on Day 2 at 14:30, most mid-pack runners will be out for 30–40 hours, meaning at least two full nights. Plan for two cold periods at altitude and carry enough calories for overnight low-appetite windows. Japanese convenience store-style aid is typically available at checkpoints, but bring gut-tested gels, real food, and electrolytes for the Lake Motosu and Nijumagari Pass sections where resupply gaps are longest. Expect to need 400–500 kcal per hour during moving time and adjust for the slowing effect of technical night terrain.
Conditions to Expect
The race takes place on the flanks of an active stratovolcano with highly variable microclimates. The southern slopes around Fujinomiya can be warm and humid in the day, while the western lakeshore at Motosu (1,124 m) is significantly colder — temperature swings of 10–15°C between valleys and passes are common. Wind exposure increases markedly on the open terrain between the lakes and on the approach to Nijumagari Pass. Trail surfaces range from well-groomed forest paths and compacted volcanic soil to rooted singletrack and sections of paved mountain road; the volcanic ash and loose scree on certain stretches make traction unpredictable, especially when wet. Headlamp runtime should be planned for the full night, and a backup light is essential given the extended overnight hours. The finish at Fuji Hokuroku Park sits at 1,007 m, and even in summer the final approach can be cold and windy — pack a dry layer in your crew bag at F9 Fujiyoshida for the last push to the finish.
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Checkpoints & cut-offs
✓ Course data verified against the official source (2026-07-05) · official source
0 km · 838 m · Fri 17:00
16.3 km · 635 m · —
25.8 km · 536 m · Fri 22:30
52.4 km · 805 m · Sat 06:00
74 km · 924 m · Sat 14:10
96.9 km · 866 m · Sat 17:30
113.2 km · 974 m · Sat 21:40
122.5 km · 1020 m · Sun 02:40
135.2 km · 1282 m · Sun 06:00
146.8 km · 840 m · Sun 10:10
165.3 km · 943 m · Sun 14:30
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