Ultramarathons in Japan

95 races tracked — the season peaks in September (26 races), with October close behind (18).

By distance 46 50K · 28 50 mi · 20 100K · 1 100 mi
Biggest field Lake Saroma 100 Km Ultramarathon — 2,721 finishers in 2015
Steepest course Yacchiro Dragon Trail — 83.2 m/km
Deepest results history Ultra-Trail Mt. Fuji — 10 recorded editions

Next starts in Japan

All 37 upcoming →
Fixed Distance50 miMountain
GRIT 8.2

Forestrail Shinjo-Hiruzen

Shinjo, Okayama Pref., JPN

68 km 3,200 m D+ Oct 25
Fixed Distance50 miVertical
GRIT 10

Manno Mountain Madness 2026

Nakato, Manno, Kagawa Pref, JPN

80 km 5,600 m D+ Oct 25
Fixed Distance50KMountain
GRIT 5.9

Nakanoto Treasure Trail Run Festival

Nakanoto, Kashima District, Ishikawa Pref., JPN

50 km 2,300 m D+ Nov 1
Fixed Distance50KMountain
GRIT 6.2

Ninja Trail Run

Iga, Mie Pref., JPN

48 km 2,500 m D+ Nov 1
Fixed Distance50 miMountain
GRIT 8.2

Ryoma Dappan Trail Race

Tsuno, Kochi Pref., JPN

70 km 3,130 m D+ Nov 1
Fixed Distance50KMountain
GRIT 5.5

Sea Alps Trail Journey

Fudai, JPN

49 km 2,031 m D+ Nov 1
Fixed Distance50 miMountain
GRIT 9.7

Koshu Alps Haute Route Challenge

Koshu, Yamanashi Pref., JPN

68 km 4,200 m D+ Nov 8
Fixed Distance100KMountain
GRIT 10

Koshu Alps Haute Route Challenge Klesa 108

Koshu, Yamanashi Pref., JPN

108 km 5,905 m D+ Nov 8
Fixed Distance50KMountain
GRIT 7.3

Koshu Alps Haute Route Challenge Lily Route

Koshu, Yamanashi Pref., JPN

55 km 3,009 m D+ Nov 8
Fixed Distance50KMountain
GRIT 6.8

FunTrails50K Round

Chichibu, Saitama Pref., JPN

50 km 2,850 m D+ Nov 14
Fixed Distance100K
GRIT 5.2

Nagasaki Tachibana Gulf Coast Super Maranic 103

Nagasaki, JPN

103 km Nov 22
Fixed Distance50KMountain
GRIT 6.7

Trainic world Soto-Chichibu Trail Run 50km

Yorii, Saitama Pref., JPN

46 km 2,900 m D+ Nov 29